Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2018 shares
Document and Entity Information
Entity Registrant Name	MAGELLAN HEALTH INC
Entity Central Index Key	0000019411
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	24,255,074
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents ($229,013 and $57,613 restricted at December 31, 2017 and September 30, 2018, respectively)	$ 234,264	$ 398,732
Accounts receivable, net	820,748	660,775
Short-term investments ($219,111 and $319,085 restricted at December 31, 2017 and September 30, 2018, respectively)	374,669	310,578
Pharmaceutical inventory	44,035	40,945
Other current assets ($41,121 and $52,003 restricted at December 31, 2017 and September 30, 2018, respectively)	102,829	72,323
Total Current Assets	1,576,545	1,483,353
Property and equipment, net	154,826	158,638
Long-term investments ($17,287 and $4,090 restricted at December 31, 2017 and September 30, 2018, respectively)	4,090	17,287
Deferred income taxes	1,071	813
Other long-term assets	51,391	22,567
Goodwill	1,015,076	1,006,288
Other intangible assets, net	245,516	268,288
Total Assets	3,048,515	2,957,234
Current Liabilities:
Accounts payable	73,144	74,300
Accrued liabilities	209,012	193,635
Short-term contingent consideration	7,131	6,892
Medical claims payable	402,497	327,625
Other medical liabilities	162,009	177,002
Current debt, capital lease and deferred financing obligations	64,778	112,849
Total Current Liabilities	918,571	892,303
Long-term debt, capital lease and deferred financing obligations	733,969	740,888
Deferred income taxes	12,802	12,298
Tax contingencies	14,326	14,226
Long-term contingent consideration	2,137	1,925
Deferred credits and other long-term liabilities	34,959	19,100
Total Liabilities	1,716,764	1,680,740
STOCKHOLDERS' EQUITY
Preferred stock, par value $.01 per share Authorized—10,000 shares at December 31, 2017 and September 30, 2018-Issued and outstanding-none
Ordinary common stock, par value $.01 per share Authorized-100,000 shares at December 31, 2017 and September 30, 2018-Issued and outstanding-52,973 and 24,202 shares at December 31, 2017, respectively, and 53,526 and 24,255 shares at September 30, 2018, respectively	535	530
Other Stockholders' Equity:
Additional paid-in capital	1,324,176	1,274,811
Retained earnings	1,447,416	1,399,495
Accumulated other comprehensive loss	(373)	(380)
Treasury stock, at cost, 28,771 and 29,271 shares at December 31, 2017 and September 30, 2018, respectively	(1,440,003)	(1,397,962)
Total Stockholders' Equity	1,331,751	1,276,494
Total Liabilities and Stockholders' Equity	$ 3,048,515	$ 2,957,234

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CONSOLIDATED BALANCE SHEETS
Restricted cash and cash equivalents	$ 57,613	$ 229,013
Short-term restricted investments (in dollars)	319,085	219,111
Other current restricted assets (in dollars)	52,003	41,121
Long term restricted investments (in dollars)	$ 4,090	$ 17,287
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	10,000	10,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	100,000	100,000
Common stock, issued shares	53,526	52,973
Common stock, outstanding shares	24,255	24,202
Ordinary common stock in treasury, shares	29,271	28,771

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net revenue:
Net revenue	$ 1,853,506	$ 1,419,406	$ 5,469,506	$ 4,144,168
Costs and expenses:
Cost of care	938,031	569,306	2,802,506	1,634,624
Cost of goods sold	571,145	543,682	1,689,229	1,648,670
Direct service costs and other operating expenses	265,471	227,372	793,700	680,230
Depreciation and amortization	33,047	28,189	97,302	82,896
Interest expense	8,990	7,663	26,034	16,711
Interest and other income	(4,139)	(1,781)	(9,978)	(3,801)
Total costs and expenses	1,812,545	1,374,431	5,398,793	4,059,330
Income before income taxes	40,961	44,975	70,713	84,838
Provision for income taxes	13,816	11,739	18,565	29,206
Net income	27,145	33,236	52,148	55,632
Less: net income (loss) attributable to non-controlling interest	0	785	0	(66)
Net income attributable to Magellan	$ 27,145	$ 32,451	$ 52,148	$ 55,698
Net income attributable to Magellan per common share:
Basic (in dollars per share)	$ 1.11	$ 1.39	$ 2.13	$ 2.41
Diluted (in dollars per share)	$ 1.09	$ 1.32	$ 2.06	$ 2.30
Managed care and other
Net revenue:
Net revenue	$ 1,235,787	$ 834,358	$ 3,670,890	$ 2,385,397
PBM
Net revenue:
Net revenue	$ 617,719	$ 585,048	$ 1,798,616	$ 1,758,771

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENTS OF INCOME
Stock compensation expense	$ 9,320	$ 10,323	$ 27,405	$ 31,834
Changes in fair value of contingent consideration	$ 148	$ (834)	$ 451	$ (631)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 27,145	$ 33,236	$ 52,148	$ 55,632
Other comprehensive income:
Unrealized gain on available-for-sale securities	194	26	7	27
Comprehensive income	27,339	33,262	52,155	55,659
Less: comprehensive income (loss) attributable to non-controlling interest		785		(66)
Comprehensive income attributable to Magellan	$ 27,339	$ 32,477	$ 52,155	$ 55,725

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3000-108585

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686

+ Details

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 52,148	$ 55,632
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	97,302	82,896
Non-cash interest expense	919	3,120
Non-cash stock compensation expense	27,405	31,834
Non-cash income tax (benefit) provision	1,814	(2,160)
Non-cash amortization on investments	1,404	3,052
Changes in assets and liabilities, net of effects from acquisitions of businesses:
Accounts receivable, net	(160,904)	(13,539)
Pharmaceutical inventory	(3,090)	9,609
Other assets	(60,008)	(15,481)
Accounts payable and accrued liabilities	(13,781)	(70,006)
Medical claims payable and other medical liabilities	73,667	25,578
Contingent consideration	451	(631)
Tax contingencies	100	158
Deferred credits and other long-term liabilities	16,497	2,408
Other	93	210
Net cash provided by operating activities	34,017	112,680
Cash flows from investing activities:
Capital expenditures	(51,244)	(42,703)
Acquisitions and investments in businesses, net of cash acquired	(402)	(3,200)
Purchases of investments	(453,007)	(341,280)
Proceeds from maturities and sales of investments	400,683	320,045
Net cash used in investing activities	(103,970)	(67,138)
Cash flows from financing activities:
Proceeds from issuance of debt		949,239
Payments to acquire treasury stock	(41,039)	(15,457)
Proceeds from exercise of stock options	22,587	28,328
Payments on debt, capital lease and deferred financing obligations	(75,043)	(798,359)
Payments on contingent consideration		(1,032)
Other	(1,020)	(8,005)
Net cash provided by (used in) financing activities	(94,515)	154,714
Net increase (decrease) in cash and cash equivalents	(164,468)	200,256
Cash and cash equivalents at beginning of period	398,732	304,508
Cash and cash equivalents at end of period	234,264	504,764
Non-cash investing activities:
Assets acquired under capital leases and deferred financing	$ 19,545	$ 2,418

General

9 Months Ended

Sep. 30, 2018

General

General

NOTE A—General

Basis of Presentation

The accompanying unaudited consolidated financial statements of Magellan Health, Inc., a Delaware corporation (“Magellan”), include Magellan and its subsidiaries (together with Magellan, the “Company”). The financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the Securities and Exchange Commission’s (the “SEC”) instructions to Form 10-Q. Accordingly, the financial statements do not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring adjustments considered necessary for a fair presentation, have been included. The results of operations for the three and nine months ended September 30, 2018 are not necessarily indicative of the results to be expected for the full year. All significant intercompany accounts and transactions have been eliminated in consolidation.

These unaudited consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2017 and the notes thereto, which are included in the Company’s Annual Report on Form 10-K filed with the SEC on March 1, 2018.

Business Overview

The Company is a leader within the healthcare management business, and is focused on delivering innovative specialty solutions for the fastest growing, most complex areas of health, including special populations, complete pharmacy benefits, and other specialty carve-out areas of healthcare. The Company develops innovative solutions that combine advanced analytics, agile technology and clinical excellence to drive better decision making, positively impact members’ health outcomes and optimize the cost of care for the customers we serve. The Company provides services to health plans and other managed care organizations (“MCOs”), employers, labor unions, various military and governmental agencies and third party administrators (“TPAs”). Magellan operates three segments: Healthcare, Pharmacy Management and Corporate.

Healthcare

During the third quarter of 2018, the Company re-evaluated how it was managing the Healthcare business segment and decided a reorganization was necessary to effectively manage the business going forward. As a result of this business reorganization, the Company concluded that changes to Healthcare’s reporting units were warranted. Healthcare now consists of two reporting units – Behavioral & Specialty Health and Magellan Complete Care (“MCC”). Effective August 1, 2018, the Company evaluated the impact of the reorganization on its previously identified reporting units. The Company allocated goodwill to the new reporting units using a relative fair value approach. In addition, the Company completed an assessment of any potential goodwill impairment for all reporting units immediately prior to and immediately after the reallocation and determined that no impairment existed.

The Behavioral & Specialty Health reporting unit’s customers include health plans, accountable care organizations (“ACOs”), employers, the United States military and various federal government agencies for whom Magellan provides carve-out management services for behavioral health, employee assistance plans (“EAP”), and other areas of specialty healthcare including diagnostic imaging, musculoskeletal management, cardiac, and physical medicine. These management services can be applied broadly across commercial, Medicaid and Medicare populations, or on a more targeted basis for our health plans and ACO customers. The Behavioral & Specialty Health unit also includes Magellan’s carve-out behavioral health contracts with various state Medicaid agencies.

The MCC reporting unit contracts with state Medicaid agencies and the Centers for Medicare and Medicaid Services (“CMS”) to manage care for beneficiaries under various Medicaid and Medicare programs. MCC manages a wide range of services from total medical cost to carve out long term support services. MCC largely focuses on managing care for special populations including individuals with serious mental illness (“SMI”), dual eligibles, aged, blind and disabled (“ABD”) and other populations with unique and often complex healthcare needs.

Magellan’s coordination and management of these healthcare and long term support services are provided through its comprehensive network of medical and behavioral health professionals, clinics, hospitals, skilled nursing facilities, home care agencies and ancillary service providers. This network of credentialed providers is integrated with clinical and quality improvement programs to improve access to care and enhance the healthcare experience for individuals in need of care, while at the same time making the cost of these services more affordable for our customers. The Company generally does not directly provide or own any provider of treatment services, although it does employ licensed behavioral health counselors to deliver non‑medical counseling under certain government contracts.

The Company provides its Healthcare management services primarily through: (i) risk‑based products, where the Company assumes all or a substantial portion of the responsibility for the cost of providing treatment services in exchange for a fixed per member per month fee, or (ii) administrative services only (“ASO”) products, where the Company provides services such as utilization review, claims administration and/or provider network management, but does not assume full responsibility for the cost of the treatment services, in exchange for an administrative fee and, in some instances, a gain share.

Pharmacy Management

The Pharmacy Management segment (“Pharmacy Management”) is comprised of products and solutions that provide clinical and financial management of pharmaceuticals paid under both the medical and the pharmacy benefit. Pharmacy Management’s services include: (i) pharmacy benefit management (“PBM”) services, including pharmaceutical dispensing operations; (ii) pharmacy benefit administration (“PBA”) for state Medicaid and other government sponsored programs; (iii) clinical and formulary management programs; (iv) medical pharmacy management programs; and (v) programs for the integrated management of specialty drugs across both the medical and pharmacy benefit that treat complex conditions, regardless of site of service, method of delivery, or benefit reimbursement.

These services are available individually, in combination, or in a fully integrated manner. The Company markets its pharmacy management services to health plans, employers, third party administrators, managed care organizations, state governments, Medicare Part D, and other government agencies, exchanges, brokers and consultants. In addition, the Company will continue to upsell its pharmacy products to its existing customers and market its pharmacy solutions to the Healthcare customer base.

Pharmacy Management contracts with its customers for services using risk‑based, gain share or ASO arrangements. In addition, Pharmacy Management provides services to the Healthcare segment for its MCC business.

Corporate

This segment of the Company is comprised primarily of amounts not allocated to the Healthcare and Pharmacy Management segments that are largely associated with costs related to being a publicly traded company.

Summary of Significant Accounting Policies

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The FASB also issued various ASUs which subsequently amended ASU 2014-09. These amendments and ASU 2014-09, collectively known as Accounting Standard Codification 606 (“ASC 606”), were adopted on a modified retrospective basis in the quarter ended March 31, 2018. The Company applied the standard to contracts not completed at the date of initial application. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. For contracts that were modified before January 1, 2018 the Company has not retrospectively restated the contracts for those modifications in accordance with the contract modification guidance, instead the Company reflected the aggregate effect of those modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price to the satisfied and unsatisfied performance obligation. Given the nature of our arrangements, the Company does not believe the use of this practical expedient had a significant impact on the results of our adoption.

A majority of our managed care revenue continues to be recognized over the applicable coverage period on a per member basis for covered members. In addition, a majority of the PBM revenue continues to be recognized as the claims are adjudicated or when the drugs are dispensed. The main impacts of ASC 606 to the Company’s business relate to the timing of revenue recognition in relation to upfront fees in certain PBA contracts, as well as performance incentive, performance guarantee and risk share arrangements. Some of the Company’s PBA contracts contain upfront fees, which under ASC 605 were amortized over the life of the contract. Under ASC 606, these upfront fees constitute a material right and are amortized over the anticipated life of the customer. Certain contracts include performance incentive, performance guarantee and risk share arrangements, which under ASC 605 were recorded based on calculations using the current period’s data. Under ASC 606, the revenues are recognized on a probability weighted approach based on anticipated outcomes for the performance period. In addition, under ASC 606 the accounting for material rights in relation to some of the Company’s government contracts will impact the consolidated balance sheets for interim reporting periods.

The cumulative effect of changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASU 2014-09 were as follows (in thousands):


	Balance at December 31, 2017		Adjustments Due to ASC 606		Balance at January 1, 2018
Assets
Other current assets	$	72,323	$	(667)	$	71,656
Total Current Assets		1,483,353		(667)		1,482,686
Deferred income taxes		813		1,335		2,148
Other long-term assets		22,567		(1,333)		21,234
Total Assets		2,957,234		(665)		2,956,569

Liabilities and Stockholders' Equity
Accrued liabilities		193,635		(2,182)		191,453
Total Current Liabilities		892,303		(2,182)		890,121
Deferred credits and other long-term liabilities		19,100		5,744		24,844
Total Liabilities		1,680,740		3,562		1,684,302
Retained earnings		1,399,495		(4,227)		1,395,268
Total Stockholders' Equity		1,276,494		(4,227)		1,272,267
Total Liabilities and Stockholders' Equity		2,957,234		(665)		2,956,569

The impact of the adoption of ASC 606 on our consolidated balance sheet as of September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Assets
Accounts receivable	$	820,748	$	(12,119)	$	808,629
Other current assets		102,829		1,116		103,945
Total Current Assets		1,576,545		(11,003)		1,565,542
Other long-term assets		51,391		4,667		56,058
Total Assets		3,048,515		(6,336)		3,042,179

Liabilities and Stockholders' Equity
Accrued liabilities		209,012		(3,377)		205,635
Other medical liabilities		162,009		119		162,128
Total Current Liabilities		918,571		(3,258)		915,313
Deferred credits and other long-term liabilities		34,959		(7,380)		27,579
Total Liabilities		1,716,764		(10,638)		1,706,126
Retained earnings		1,447,416		4,302		1,451,718
Total Stockholders' Equity		1,331,751		4,302		1,336,053
Total Liabilities and Stockholders' Equity		3,048,515		(6,336)		3,042,179

The impact of the adoption of ASC 606 on our consolidated income statement for the three months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	1,235,787	$	(1,588)	$	1,234,199
PBM		617,719		(3,714)		614,005
Total net revenue		1,853,506		(5,302)		1,848,204
Cost of goods sold		571,145		651		571,796
Total costs and expenses		1,812,545		651		1,813,196
Income before income taxes		40,961		(5,953)		35,008
Provision for income taxes		13,816		(1,566)		12,250
Net income		27,145		(4,387)		22,758
Net income attributable to Magellan		27,145		(4,387)		22,758

The impact of the adoption of ASC 606 on our consolidated income statement for the nine months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	3,670,890	$	(5,543)	$	3,665,347
PBM		1,798,616		4,485		1,803,101
Total net revenue		5,469,506		(1,058)		5,468,448
Cost of goods sold		1,689,229		651		1,689,880
Total costs and expenses		5,398,793		651		5,399,444
Income before income taxes		70,713		(1,709)		69,004
Provision for income taxes		18,565		(449)		18,116
Net income		52,148		(1,260)		50,888
Net income attributable to Magellan		52,148		(1,260)		50,888

In February 2016, the FASB issued ASU No. 2016‑02, “Leases” (“ASU 2016‑02”). This ASU amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets. The FASB also issued various ASUs which subsequently amended ASU 2016-02. These amendments and ASU 2016-02, collectively known as Accounting Standard Codification 842 (“ASC 842”), are effective for annual and interim reporting periods of public entities beginning after December 15, 2018, with early adoption permitted. The Company intends to adopt the new standard on a modified retrospective basis and apply the transition method which will not require adjustments to comparative periods nor require modified disclosures in those comparative periods. The Company is in the process of implementing new leasing software capable of producing the data to prepare the required accounting and disclosures prescribed by ASC 842. The Company is currently assessing the impact of this ASU, but believes the adoption of this ASU will have a material effect on the Company’s consolidated balance sheets. The Company does not anticipate the adoption of this ASU will have a material impact on the Company’s consolidated results of operations.

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). This ASU amends the accounting on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. This guidance is effective for annual and interim periods of public entities beginning after December 15, 2019, with early adoption permitted for fiscal years beginning after December 31, 2018. The Company is currently assessing the potential impact this ASU will have on the Company’s consolidated results of operation, financial position and cash flows.

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment” (“ASU 2017-04”). The amendments in this ASU eliminate the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. This guidance is effective for annual and interim periods of public entities beginning after December 15, 2019, with early adoption permitted. The Company is currently assessing the potential impact this ASU will have on the Company’s consolidated results of operations, financial position and cash flows.

In August 2018, the FASB issued ASU No. 2018-15, “Intangibles-Goodwill and Other–Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract” (“ASU 2018-15”). This ASU aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This guidance is effective for annual and interim periods of public entities beginning after December 15, 2019, with early adoption permitted. The Company is currently assessing the potential impact this ASU will have on the Company’s consolidated results of operations, financial position and cash flows.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates of the Company include, among other things, accounts receivable realization, valuation allowances for deferred tax assets, valuation of goodwill and intangible assets, medical claims payable, other medical liabilities, contingent consideration, stock compensation assumptions, tax contingencies and legal liabilities. In addition, the Company makes significant estimates in relation to revenue recognition under ASC 606 which are explained in more detail in “Revenue Recognition” below. Actual results could differ from those estimates.

Revenue Recognition

Virtually all of the Company’s revenues are derived from business in North America. The following tables disaggregate our revenue for the three and nine months ended September 30, 2018 by major service line, type of customer and timing of revenue recognition (in thousands):


	Three Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	377,615	$	—	$	(82)	$	377,533
EAP risk-based		79,854		—		—		79,854
ASO		65,326		9,143		(70)		74,399
Magellan Complete Care
Risk-based, non-EAP		639,584		—		—		639,584
ASO		14,060		—		—		14,060
PBM, including dispensing		—		549,508		(48,015)		501,493
Medicare Part D		—		116,226		—		116,226
PBA		—		33,158		—		33,158
Formulary management		—		16,601		—		16,601
Other		—		598		—		598
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Type of Customer
Government	$	874,135	$	238,175	$	—	$	1,112,310
Non-government		302,304		487,059		(48,167)		741,196
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	665,734	$	(48,015)	$	617,719
Transferred over time		1,176,439		59,500		(152)		1,235,787
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506


	Nine Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	1,128,743	$	—	$	(196)	$	1,128,547
EAP risk-based		265,787		—		—		265,787
ASO		189,241		24,972		(252)		213,961
Magellan Complete Care
Risk-based, non-EAP		1,863,771		—		—		1,863,771
ASO		41,386		—		—		41,386
PBM, including dispensing		—		1,619,431		(142,110)		1,477,321
Medicare Part D		—		321,295		—		321,295
PBA		—		99,792		—		99,792
Formulary management		—		55,326		—		55,326
Other		—		2,320		—		2,320
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Type of Customer
Government	$	2,585,525	$	696,172	$	—	$	3,281,697
Non-government		903,403		1,426,964		(142,558)		2,187,809
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	1,940,726	$	(142,110)	$	1,798,616
Transferred over time		3,488,928		182,410		(448)		3,670,890
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Per Member Per Month (“PMPM”) Revenue. Almost all of the Healthcare revenue and a small portion of the Pharmacy Management revenue is paid on a PMPM basis. PMPM revenue is inclusive of revenue from the Company’s risk, EAP and ASO contracts and primarily relates to managed care contracts for services such as the provision of behavioral healthcare, specialty healthcare, pharmacy management, or fully integrated healthcare services. PMPM contracts generally have a term of one year or longer, with the exception of government contracts where the customer can terminate with as little as 30 days’ notice for no significant penalty. All managed care contracts have a single performance obligation that constitutes a series for the provision of managed healthcare services for a population of enrolled members for the duration of the contract. The transaction price for PMPM contracts is entirely variable as it primarily includes per member per month fees associated with unspecified membership that fluctuates throughout the contract. In certain contracts, PMPM fees also include adjustments for things such as performance incentives, performance guarantees and risk shares. The Company generally estimates the transaction price using an expected value methodology and amounts are only included in the net transaction price to the extent that it is probable that a significant reversal of cumulative revenue will not occur once any uncertainty is resolved. The majority of the Company’s net PMPM transaction price relates specifically to its efforts to transfer the service for a distinct increment of the series (e.g. day or month) and is recognized as revenue in the month in which members are entitled to service. The remaining transaction price is recognized over the contract period (or portion of the series to which it specifically relates) based upon estimated membership as a measure of progress.

Under certain government contracts, our risk scores are compared with the overall average risk scores for the relevant state and market pool. Generally, if our risk score is below the average risk score we are required to make a risk adjustment payment into the risk pool, and if our risk score is above the average risk score we will receive a risk adjustment payment from the risk pool. Risk adjustments can have a positive or negative retroactive impact to rates.

Pharmacy Benefit Management Revenue. The Company’s customers for PBM business, including pharmaceutical dispensing operations, are generally comprised of MCOs, employer groups and health plans. PBM relationships generally have an expected term of one year or longer. A master services arrangement (“MSA”) is executed by the Company and the customer, which outlines the terms and conditions of the PBM services to be provided. When a member in the customer’s organization submits a prescription, a claim is created which is presented for approval. The acceptance of each individual claim creates enforceable rights and obligations for each party and represents a separate contract. For each individual claim, the performance obligations are limited to the processing and adjudication of the claim, or dispensing of the products purchased. Generally, the transaction price for PBM services is explicitly listed in each contract and does not represent variable consideration. The Company recognizes PBM revenue, which consists of a negotiated prescription price (ingredient cost plus dispensing fee), co‑payments and any associated administrative fees, when claims are adjudicated or the drugs are shipped. The Company recognizes PBM revenue on a gross basis (i.e. including drug costs and co‑payments) as it is acting as the principal in the arrangement, controls the underlying service, and is contractually obligated to its clients and network pharmacies, which is a primary indicator of gross reporting. In addition, the Company is solely responsible for the claims adjudication process, negotiating the prescription price for the pharmacy, collection of payments from the client for drugs dispensed by the pharmacy, and managing the total prescription drug relationship with the client’s members. If the Company enters into a contract where it is only an administrator, and does not assume any of the risks previously noted, revenue will be recognized on a net basis. For dispensing, at the time of shipment, the earnings process is complete; the obligation of the Company’s customer to pay for the specialty pharmaceutical drugs is fixed, and, due to the nature of the product, the member may neither return the specialty pharmaceutical drugs nor receive a refund.

Medicare Part D. The Company is contracted with CMS as a Prescription Drug Plan (“PDP”) to provide prescription drug benefits to Medicare beneficiaries. The accounting for Medicare Part D revenue is primarily the same as that for PBM, as previously discussed. However, there is certain variable consideration present only in Medicare Part D arrangements. The Company estimates the annual amount of variable consideration using a most likely amount methodology, which is allocated to each reporting period based upon actual utilization as a percentage of estimated utilization for the year. Amounts estimated throughout the year for interim reporting are substantially resolved and fixed as of December 31st, the end of the plan year.

Pharmacy Benefit Administration Revenue. The Company provides Medicaid pharmacy services to states and other government sponsored programs. PBA contracts are generally multi-year arrangements but include language regarding early termination for convenience without material penalty provisions that results in enforceable rights and obligations on a month-to-month basis. In PBA arrangements, the Company is generally paid a fixed fee per month to provide PBA services. In addition, some PBA contracts contain upfront fees that constitute a material right. For contracts without an upfront fee, there is a single performance obligation to stand ready to provide the PBA services required for the contracted period. The Company believes that the customer receives the PBA benefits each day from access to the claims processing activities, and has concluded that a time based measure is appropriate for recognizing PBA revenue. For contracts with an upfront fee, the material right represents an additional performance obligation. Amounts allocated to the material right are initially recorded as a contract liability and recognized as revenue over the anticipated period of benefit of the material right, which generally ranges from 2 to 10 years.

Formulary Management Revenue. The Company administers formulary management programs for certain clients through which the Company coordinates the achievement, calculation and collection of rebates and administrative fees from pharmaceutical manufacturers on behalf of clients. Formulary management contracts generally have a term of one year or longer. All formulary management contracts have a single performance obligation that constitutes a series for the provision of rebate services for a drug, with utilization measured and settled on a quarterly basis, for the duration of the arrangement. The Company retains its administrative fee and/or a percentage of rebates that is included in its contract with the client from collecting the rebate from the manufacturer. While the administrative fee and/or the percentage of rebates retained is fixed, there is an unknown quantity of pharmaceutical purchases (utilization) during each quarter, therefore the transaction price itself is variable. The Company uses the expected value methodology to estimate the total rebates earned each quarter based on estimated volumes of pharmaceutical purchases by the Company’s clients during the quarter, as well as historical and/or anticipated retained rebate percentages. The Company does not record as rebate revenue any rebates that are passed through to its clients.

In relation to the Company’s PBM business, the Company administers rebate programs through which it receives rebates from pharmaceutical manufacturers that are shared with its customers. The Company recognizes rebates when the Company is entitled to them and when the amounts of the rebates are determinable. The amount recorded for rebates earned by the Company from the pharmaceutical manufacturers is recorded as a reduction of cost of goods sold.

Government EAP Risk Based Revenue. The Company has certain contracts with federal customers for the provision of various managed care services, which are classified as EAP risk based business. These contracts are generally multi-year arrangements. The Company’s federal contracts are reimbursed on either a fixed fee basis or a cost reimbursement basis. The performance obligation on a fixed fee contract is to stand ready to provide the staffing required for the contracted period. For fixed fee contracts, the Company believes the invoiced amount corresponds directly with the value to the customer of the Company’s performance completed to date, therefore the Company is utilizing the “right to invoice” practical expedient, with revenue recognition in the amount for which the Company has the right to invoice.

The performance obligation on a cost reimbursement contract is to stand ready to provide the activity or services purchased by the customer, such as the operation of a counseling services group or call center. The performance obligation represents a series for the duration of the arrangement. The reimbursement rate is fixed per the contract, however the level of activity (e.g., number of hours, number of counselors or number of units) is variable. A majority of the Company’s cost reimbursement transaction price relates specifically to its efforts to transfer the service for a distinct increment of the series (e.g. day or month) and is recognized as revenue when the portion of the series for which it relates has been provided (i.e. as the Company provides hours, counselors or units of service).

In accordance with ASC 606-10-50-13, the Company is required to include disclosure on its remaining performance obligations as of the end of the current reporting period. Due to the nature of the contracts in the Company’s PBM and Part D business, these reporting requirements are not applicable. The majority of the Company’s remaining contracts meet certain exemptions as defined in ASC 606-10-50-14 through 606-10-50-14A, including (i) performance obligation is part of a contract that has an original expected duration of one year or less; (ii) the right to invoice practical expedient; and (iii) variable consideration related to unsatisfied performance obligations that is allocated entirely to a wholly unsatisfied promise to transfer a distinct service that forms part of a single performance obligation, and the terms of that variable consideration relate specifically to our efforts to transfer the distinct service, or to a specific outcome from transferring the distinct service. For the Company’s contracts that pertain to these exemptions: (i) the remaining performance obligations primarily relate to the provision of managed healthcare services to the customers’ membership; (ii) the estimated remaining duration of these performance obligations ranges from the remainder of the current calendar year to three years; and (iii) variable consideration for these contracts primarily includes net per member per month fees associated with unspecified membership that fluctuates throughout the contract.

Accounts Receivable, Contract Assets and Contract Liabilities

Accounts receivable, contract assets and contract liabilities consisted of the following (in thousands, except percentages):


	January 1,		September 30,
	2018		2018		$ Change		% Change
Accounts receivable	$	679,269	$	864,860	$	185,591		27.3%
Contract assets		8,564		24,118		15,554		181.6%
Contract liabilities - current		14,299		21,536		7,237		50.6%
Contract liabilities - long-term		12,303		12,577		274		2.2%

Accounts receivable, which are included in accounts receivable, other current assets and other long-term assets on the consolidated balance sheets, increased by $185.6 million, mainly due to timing. Contract assets, which are included in other current assets on the consolidated balance sheets, increased by $15.6 million, mainly due to the timing of accrual of certain performance incentives. Contract liabilities – current, which are included in accrued liabilities on the consolidated balance sheets, increased by $7.2 million, mainly due to the timing of receipts related to October 2018 revenues and the timing of material rights generated for some of the Company’s government contracts. Contract liabilities – long-term, which are included in deferred credits and other long-term liabilities on the consolidated balance sheets, increased by $0.3 million, mainly due to receipts for which recognition will be long-term.

During the three months ended September 30, 2018, the Company recognized revenue of $59.2 million that was included in current contract liabilities at June 30, 2018. During the nine months ended September 30, 2018, the Company recognized revenue of $11.3 million that was included in current contract liabilities at January 1, 2018. The estimated timing of recognition of amounts included in contract liabilities at September 30, 2018 are as follows: 2018—$12.7 million; 2019—$9.7 million; 2020—$3.0 million; 2021 and beyond—$8.7 million. During the three and nine months ended September 30, 2018, the Company recognized revenue of $18.4 million and $21.6 million, respectively, for one customer that was related to performance obligations that were satisfied, or partially satisfied, in previous periods. During these periods, all other revenue that the Company recognized related to performance obligations that were satisfied, or partially satisfied, in previous periods was not material.

The Company’s accounts receivable consists of amounts due from customers throughout the United States. Collateral is generally not required. A majority of the Company’s contracts have payment terms in the month of service, or within a few months thereafter. The timing of payments from customers from time to time generate contract assets or contract liabilities, however these amounts are immaterial.

Significant Customers

Customers exceeding ten percent of the consolidated Company’s net revenues

The Company has a contract with the State of Florida to provide integrated healthcare services to Medicaid enrollees in the state of Florida (the “Florida Contract”). The Florida Contract began on February 4, 2014 and extends through December 31, 2018, unless sooner terminated by the parties. Under the Florida Contract, the Company serves all of the members in the Florida Agency for Health Care Administration (“AHCA”) Regions 2, 4, 5, 6, 7, 9, 10, and 11. The State of Florida has the right to terminate the Florida Contract with cause, as defined, upon 24 hour notice and upon 30 days notice for any reason or no reason at all. The Florida Contract generated net revenues of $457.7 million and $482.4 million for the nine months ended September 30, 2017 and 2018, respectively.

On July 14, 2017, the State of Florida issued an Invitation to Negotiate for a new contract for its Medicaid managed care program to replace the current contract with the Company and to be effective January 1, 2019. On April 24, 2018 the Company was notified by AHCA that the Company was not selected to negotiate a new contract to serve as a vendor for its Medicaid managed care program. The Company filed a protest with AHCA on May 7 2018. On August 30, 2018, the Company entered into a settlement with AHCA in regards to the Company’s protest. Pursuant to the terms of the settlement, Florida MHS, Inc. d/b/a Magellan Complete Care of Florida will be awarded a contract extending through September 30, 2023 to serve Medicaid members with SMI in AHCA Regions 4, 5, and 7 alongside another vendor. The Company will no longer serve members in Regions 2, 6, 9, 10, and 11, which represents approximately 60% of the total current membership the Company serves under the existing Florida Contract. On September 4, 2018, the Company withdrew its protest under the terms of the settlement agreement.

Customers exceeding ten percent of segment net revenues

In addition to the Florida Contract, previously discussed, the following customers generated in excess of ten percent of net revenues for the respective segment for the nine months ended September 30, 2017 and 2018 (in thousands):


Segment	Term Date	2017			2018

Healthcare
Customer A	(1)	$	131,539	*	$	534,483
Customer B	December 31, 2018 to December 31, 2020 (2)		—			506,204

Pharmacy Management
Customer C	March 31, 2019		266,795			259,514

Revenue amount did not exceed 10 percent of net revenues for the respective segment for the year presented. Amount is shown for comparative purposes only.

(1)

The Company, along with other participating managed care plans in this state, continues to provide services while a new contract is being finalized.

(2)

The customer has more than one contract. The individual contracts are scheduled to terminate at various points during the time period indicated above.

Concentration of Business

The Company also has a significant concentration of business with various counties in the State of Pennsylvania (the “Pennsylvania Counties”) which are part of the Pennsylvania Medicaid program, with members under its contract with CMS and with various agencies and departments of the United States federal government. Net revenues from the Pennsylvania Counties in the aggregate totaled $357.3 million and $410.9 million for the nine months ended September 30, 2017 and 2018, respectively. Net revenues from members in relation to its contracts with CMS in aggregate totaled $368.2 million and $321.3 million for the nine months ended September 30, 2017 and 2018, respectively. As of December 31, 2017 and September 30, 2018, the Company had $131.5 million and $139.1 million, respectively, in net receivables associated with Medicare Part D from CMS and other parties related to this business. Net revenues from contracts with various agencies and departments of the United States federal government in aggregate totaled $257.7 million and $235.3 million for the nine months ended September 30, 2017 and 2018, respectively.

The Company’s contracts with customers typically have stated terms of one to three years, and in certain cases contain renewal provisions (at the customer’s option) for successive terms of between one and two years (unless terminated earlier). Substantially all of these contracts may be immediately terminated with cause and many of the Company’s contracts are terminable without cause by the customer or the Company either upon the giving of requisite notice and the passage of a specified period of time (typically between 30 and 180 days) or upon the occurrence of other specified events. In addition, the Company’s contracts with federal, state and local governmental agencies generally are conditioned on legislative appropriations. These contracts generally can be terminated or modified by the customer if such appropriations are not made.

Fair Value Measurements

The Company has certain assets and liabilities that are required to be measured at fair value on a recurring basis. These assets and liabilities are to be measured using inputs from the three levels of the fair value hierarchy, which are as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

Level 3—Unobservable inputs that reflect the Company’s assumptions about the assumptions that market participants would use in pricing the asset or liability. The Company develops these inputs based on the best information available, including the Company’s data.

In accordance with the fair value hierarchy described above, the following table shows the fair value of the Company’s assets and liabilities that are required to be measured at fair value as of December 31, 2017 and September 30, 2018 (in thousands):


	December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (1)	$	—	$	284,064	$	—	$	284,064
Investments:
U.S. Government and agency securities		28,231		—		—		28,231
Obligations of government-sponsored enterprises (2)		—		22,088		—		22,088
Corporate debt securities		—		269,788		—		269,788
Taxable municipal bonds		—		5,000		—		5,000
Certificates of deposit		—		2,758		—		2,758
Total assets held at fair value	$	28,231	$	583,698	$	—	$	611,929

Liabilities
Contingent consideration	$	—	$	—	$	8,817	$	8,817
Total liabilities held at fair value	$	—	$	—	$	8,817	$	8,817


	September 30, 2018
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (3)	$	—	$	213,295	$	—	$	213,295
Investments:
U.S. Government and agency securities		57,384		—		—		57,384
Obligations of government-sponsored enterprises (2)		—		7,965		—		7,965
Corporate debt securities		—		292,760		—		292,760
Certificates of deposit		—		20,650		—		20,650
Total assets held at fair value	$	57,384	$	534,670	$	—	$	592,054

Liabilities
Contingent consideration	$	—	$	—	$	9,268	$	9,268
Total liabilities held at fair value	$	—	$	—	$	9,268	$	9,268

(1)

Excludes $114.7 million of cash held in bank accounts by the Company.

(2)

Includes investments in notes issued by the Federal Home Loan Bank, Federal Farm Credit Banks and Federal National Mortgage Association.

(3)

Excludes $21.0 million of cash held in bank accounts by the Company.

For the nine months ended September 30, 2018, the Company has not transferred any assets between fair value measurement levels.

The carrying values of financial instruments, including accounts receivable, accounts payable and revolving loan borrowings, approximate their fair values due to their short-term maturities. The fair value of the Notes (as defined below) of $387.2 million as of September 30, 2018 was determined based on quoted market prices and would be classified within Level 1 of the fair value hierarchy. The estimated fair value of the Company’s term loan of $332.5 million as of September 30, 2018 was based on current interest rates for similar types of borrowings and is in Level 2 of the fair value hierarchy. The estimated fair values may not represent actual values of the financial instruments that could be realized as of the balance sheet date or that will be realized in the future.

All of the Company’s investments are classified as “available-for-sale” and are carried at fair value.

As of the balance sheet date, the fair value of contingent consideration is determined based on probabilities of payment, projected payment dates, discount rates, projected operating income, member engagement and new contract execution. The Company used a probability weighted discounted cash flow method to arrive at the fair value of the contingent consideration. As the fair value measurement for the contingent consideration is based on inputs not observed in the market, these measurements are classified as Level 3 measurements as defined by fair value measurement guidance. The unobservable inputs used in the fair value measurement include the discount rate, probabilities of payment and projected payment dates.

As of December 31, 2017 and September 30, 2018, the Company estimated undiscounted future contingent payments of $9.9 million and $9.8 million, respectively. As of September 30, 2018, the aggregate amounts and projected dates of future potential contingent consideration payments were $7.2 million in 2018 and $2.6 million in 2020.

As of December 31, 2017, the fair value of the short-term and long-term contingent consideration was $6.9 million and $1.9 million, respectively, and is included in short-term contingent consideration and long-term contingent consideration, respectively, in the consolidated balance sheets. As of September 30, 2018, the fair value of the short-term and long-term contingent consideration was $7.1 million and $2.1 million, respectively, and is included in short-term contingent consideration and long-term contingent consideration, respectively, in the consolidated balance sheets.

The change in the fair value of the contingent consideration was $(0.8) million and $(0.6) million for the three and nine months ended September 30, 2017, respectively, and $0.2 million and $0.5 million for the three and nine months ended September 30, 2018, respectively, which were recorded as direct service costs and other operating expenses in the consolidated statements of income. The increases during 2018 were mainly a result of changes in present value.

The following table summarizes the Company’s liability for contingent consideration for the nine months ended September 30, 2018 (in thousands):


	September 30,
	2018
Balance as of beginning of period	$	8,817
Changes in fair value		451
Payments		—
Balance as of end of period	$	9,268

Cash and Cash Equivalents

Cash equivalents are short-term, highly liquid interest-bearing investments with maturity dates of three months or less when purchased, consisting primarily of money market instruments. At September 30, 2018, the Company’s excess capital and undistributed earnings for the Company’s regulated subsidiaries of $134.2 million are included in cash and cash equivalents.

Investments

If a debt security is in an unrealized loss position and the Company has the intent to sell the debt security, or it is more likely than not that the Company will have to sell the debt security before recovery of its amortized cost basis, the decline in value is deemed to be other‑than‑temporary and is recorded to other‑than‑temporary impairment losses recognized in income in the consolidated statements of income. For impaired debt securities that the Company does not intend to sell or it is more likely than not that the Company will not have to sell such securities, but the Company expects that it will not fully recover the amortized cost basis, the credit component of the other‑than‑temporary impairment is recognized in other‑than‑temporary impairment losses recognized in income in the consolidated statements of income and the non‑credit component of the other‑than‑temporary impairment is recognized in other comprehensive income.

As of December 31, 2017 and September 30, 2018, there were no material unrealized losses that the Company determined to be other‑than‑temporary. No realized gains or losses were recorded for the nine months ended September 30, 2017 or 2018. The following is a summary of short‑term and long‑term investments at December 31, 2017 and September 30, 2018 (in thousands):


	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	28,313	$	—	$	(82)	$	28,231
Obligations of government-sponsored enterprises (1)		22,139		—		(51)		22,088
Corporate debt securities		270,154		1		(367)		269,788
Taxable municipal bonds		5,000		—		—		5,000
Certificates of deposit		2,758		—		—		2,758
Total investments at December 31, 2017	$	328,364	$	1	$	(500)	$	327,865


	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	57,507	$	—	$	(123)	$	57,384
Obligations of government-sponsored enterprises (1)		8,009		—		(44)		7,965
Corporate debt securities		293,084		9		(333)		292,760
Certificates of deposit		20,650		—		—		20,650
Total investments at September 30, 2018	$	379,250	$	9	$	(500)	$	378,759

(1)

Includes investments in notes issued by the Federal Home Loan Bank, Federal National Mortgage Association and Federal Farm Credit Banks.

The maturity dates of the Company’s investments as of September 30, 2018 are summarized below (in thousands):


	Amortized		Estimated
	Cost		Fair Value
2018	$	65,167	$	65,132
2019		313,016		312,563
2020		1,067		1,064
Total investments at September 30, 2018	$	379,250	$	378,759

Income Taxes

The Company’s effective income tax rates were 34.4 percent and 26.3 percent for the nine months ended September 30, 2017 and 2018, respectively. These rates differ from the federal statutory income tax rate primarily due to state income taxes, permanent differences between book and tax income, and changes to recorded tax contingencies and valuation allowances. The Company also accrues interest and penalties related to uncertain tax positions in its provision for income taxes. The effective income tax rate for the nine months ended September 30, 2018 is lower than the effective rate for the nine months ended September 30, 2017 primarily due to the reduction of the U.S. corporate income tax rate from 35 percent to 21 percent and more significant tax deductions in 2018 in excess of recognized stock compensation expense. The 2018 decreases attributable to the statutory rate reduction and stock compensation expenses outweighed the increase related to the non-deductible health insurer fee that was reinstated in 2018.

The Company files a consolidated federal income tax return with its eighty-percent or more controlled subsidiaries. The Company previously filed separate consolidated federal income tax returns for AlphaCare of New York, Inc. (“AlphaCare”) and its parent, AlphaCare Holdings, Inc. (“AlphaCare Holdings”). During 2017, AlphaCare and AlphaCare Holdings became members of the Magellan federal consolidated group. The Company and its subsidiaries also file income tax returns in various state and local jurisdictions. The Company is no longer subject to federal income tax assessments for years ended prior to 2015 or, with few exceptions, to state or local income tax assessments for years ended prior to 2014. Further, the statutes of limitation regarding the assessment of 2014 federal and certain state and local income taxes expired during the quarter ended September 30, 2018 (“Current Year Quarter”). As a result, $2.0 million of tax contingency reserves recorded as of December 31, 2017 were reversed in the Current Year Quarter, of which $1.6 million is reflected as a discrete reduction to income tax expense and $0.4 million as a decrease to deferred tax assets. Additionally, $0.2 million of accrued interest was reversed in the Current Year Quarter and reflected as a reduction to income tax expense due to the closing of statutes of limitation on tax assessments.

During 2018, the Internal Revenue Service (“IRS”) began examinations of the following federal consolidated income tax returns: (i) the Company for the year ended December 31, 2015, (ii) SWH Holdings, Inc. for the year ended December 31, 2016, and (iii) AlphaCare Holdings for the year ended December 31, 2016. During the Current Year Quarter, the IRS concluded its review of the Company’s 2015 return. In resolution of that examination, the Company paid federal taxes of $0.3 million in the Current Year Quarter. The IRS has made no tax assessments in connection with the SWH or AlphaCare examinations, although those reviews could lead to proposed adjustments to the reported tax liabilities. Under the terms of the SWH Holdings, Inc. Agreement and Plan of Merger, the previous owners of SWH Holdings, Inc. provided the Company with an indemnification with respect to any such pre-acquisition period tax liabilities.

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted in 2017 and included a number of changes impacting the Company, most notably a reduction of the U.S. corporate income tax rate from 35 percent to 21 percent that was effective January 1, 2018. The legislation also provided for the acceleration of depreciation on certain assets placed in service after September 27, 2017, as well as prospective changes which began in 2018, including additional limitations on the deduction of executive compensation.

Staff Accounting Bulletin No. 118 allows registrants to include reasonable estimates as provisional amounts and provides a measurement period by which the accounting must be completed. The measurement period ends when a registrant has obtained, prepared, and analyzed the information that was needed in order to complete the accounting requirements under ASC Topic 740 but under no circumstances is the measurement period to extend beyond one year from the enactment date (i.e. December 22, 2018).

The Company did not identify any items for which a reasonable estimate of the income tax effects of the Tax Act could not be determined as of December 31, 2017. The Company included the provisional tax impacts related to the remeasurement of deferred tax assets and liabilities in its consolidated financial statements for the year ended December 31, 2017. No changes were made to those provisional balances in the current year. The Company will continue to analyze the Tax Act and additional technical and interpretive guidance on the Tax Act from the government and will complete its accounting no later than December 22, 2018.

The ultimate impact may differ from these provisional amounts, possibly materially, due to, among other things, additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be issued, and actions the Company may take as a result of the Tax Act. Additionally, any changes to the tax basis for temporary differences between the estimates in these statements and the 2017 federal return, which was filed by the Company in October, will result in a corresponding adjustment to the remeasurement of deferred taxes as of the enactment date of the Tax Act. Any such adjustments will be recorded to tax expense or benefit in the fourth quarter of 2018 after the Company completes its return to provision analysis.

Net Operating Loss Carryforwards

The Company has $38.1 million of federal net operating loss carryforwards (“NOLs”) available to reduce consolidated taxable income in 2018 and subsequent years. These NOLs (including $36.9 million incurred by AlphaCare prior to its membership in the Magellan consolidated group) will expire in 2018 through 2036 if not used and are subject to examination and adjustment by the IRS. In addition, the Company’s utilization of these NOLs is subject to limitations under the Internal Revenue Code as to the timing and use. At this time, the Company does not believe these limitations will restrict the Company’s ability to use any federal NOLs before they expire. The Company and its subsidiaries also have $93.7 million of NOLs available to reduce state and local taxable income at certain subsidiaries in 2018 and subsequent years. These NOLs will expire in 2018 through 2037 if not used and are subject to examination and adjustment by the respective tax authorities. In addition, the Company’s utilization of certain of these NOLs is subject to limitations as to the timing and use. Other than those considered in determining the valuation allowances discussed below, the Company does not believe these limitations will restrict the Company’s ability to use any of these state and local NOLs before they expire.

Deferred tax assets as of December 31, 2017 and September 30, 2018 are shown net of valuation allowances of $2.4 million. These valuation allowances mostly relate to uncertainties regarding the eventual realization of certain state NOLs.

Reversals of valuation allowances are recorded in the period they occur, typically as reductions to income tax expense. Determination of the amount of deferred tax assets considered realizable requires significant judgment and estimation regarding the forecasts of future taxable income which are consistent with the plans and estimates the Company uses to manage the underlying businesses. Although consideration is also given to potential tax planning strategies which might be available to improve the realization of deferred tax assets, none were identified which were both prudent and reasonable. The Company believes taxable income expected to be generated in the future will be sufficient to support realization of the Company’s deferred tax assets, as reduced by valuation allowances. This determination is based upon earnings history and future earnings expectations.

Health Care Reform

The Patient Protection and the Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010 (collectively, the “Health Reform Law”), imposes a mandatory annual fee on health insurers for each calendar year beginning on or after January 1, 2014. The Company has obtained rate adjustments from customers which the Company expects will cover the direct costs of these fees and the impact from non‑deductibility of such fees for federal and state income tax purposes. To the extent the Company has such a customer that does not renew, there may be some impact due to taxes paid where the timing and amount of recoupment of these additional costs is uncertain. In the event the Company is unable to obtain rate adjustments to cover the financial impact of the annual fee, the fee may have a material impact on the Company. The Consolidated Appropriations Act of 2016 imposed a one-year moratorium on the Health Reform Law health insurer fee (“HIF”), suspending its application for 2017. The HIF fee went back into effect for 2018, however, on January 23, 2018 the United States Congress passed the Continuing Resolution which imposed another one-year moratorium on the HIF fee, suspending its application for 2019. For 2018 the HIF fee was $29.9 million which has been paid.

Stock Compensation

At December 31, 2017 and September 30, 2018, the Company had equity‑based employee incentive plans, which are described more fully in Note 6 in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2017, which was filed with the SEC on March 1, 2018. The Company recorded stock compensation expense of $10.3 million and $31.8 million for the three and nine months ended September 30, 2017 and $9.3 million and $27.4 million for the three and nine months ended September 30, 2018, respectively. Stock compensation expense recognized in the consolidated statements of income for the three and nine months ended September 30, 2017 and 2018 has been reduced for forfeitures, estimated at between zero and four percent for all periods.

The weighted average grant date fair value of all stock options granted during the nine months ended September 30, 2018 was $25.86 as estimated using the Black‑Scholes‑Merton option pricing model, which also assumed an expected volatility of 28.21 percent based on the historical volatility of the Company’s stock price.

For the nine months ended September 30, 2017 and 2018, the benefit of tax deductions in excess of recognized stock compensation expense (net of deficiencies) was $3.7 million and $5.0 million, respectively, which were reported as a reduction to income tax expense.

Summarized information related to the Company’s stock options for the nine months ended September 30, 2018 is as follows:


		Weighted
		Average
		Exercise
	Options	Price
Outstanding, beginning of period	2,458,237	$	61.50
Granted	451,456		98.45
Forfeited	(59,427)		77.53
Exercised	(400,869)		56.35
Outstanding, end of period	2,449,397	$	68.77
Vested and expected to vest at end of period	2,434,842	$	68.66
Exercisable, end of period	1,512,481	$	60.31

All of the Company’s options granted during the nine months ended September 30, 2018 vest ratably on each anniversary date over the three years subsequent to grant and have a ten year life.

Summarized information related to the Company’s nonvested restricted stock awards (“RSAs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	31,102	$	68.00
Awarded	11,795		89.05
Vested	(31,102)		68.00
Forfeited	—		—
Outstanding, ending of period	11,795		89.05

Summarized information related to the Company’s nonvested restricted stock units (“RSUs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	163,289	$	66.46
Awarded	111,033		99.29
Vested	(82,207)		65.54
Forfeited	(18,231)		83.93
Outstanding, ending of period	173,884		86.03

The vesting period for RSAs ranges from 12 months to 24 months. In general, RSUs vest ratably on each anniversary over the three years subsequent to grant.

Summarized information related to the Company’s nonvested restricted performance stock units (“PSUs”) for the nine months ended September 30, 2018 is as follows:


	2018
		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	202,315	$	84.63
Awarded	80,502		141.61
Vested	(33,592)		85.00
Forfeited	(1,865)		97.25
Outstanding, end of period	247,360		103.03

The weighted average estimated fair value of the PSUs granted in the nine months ended September 30, 2018 was $141.61, which was derived from a Monte Carlo simulation. Significant assumptions utilized in estimating the value of the awards granted include an expected dividend yield of 0%, a risk free rate of 2.37%, and expected volatility of 20% to 82% (average of 35%). The PSUs granted in the nine months ended September 30, 2018, will entitle the grantee to receive a number of shares of the Company’s common stock determined over a three-year performance period ending on December 31, 2020 and vesting on March 5, 2021, the settlement date, provided the grantee remains in the service of the Company on the settlement date. The Company expenses the cost of these awards ratably over the requisite service period. The number of shares for which the PSUs will be settled is calculated as a percentage of the award target and will depend on the Company’s total shareholder return (as defined below), expressed as a percentile ranking of the Company’s total shareholder return as compared to the Company’s peer group (as defined below). The number of shares for which the PSUs will be settled varies from zero to 200 percent of the shares specified in the grant. Total shareholder return is determined by dividing the average share value of the Company’s common stock over the 30 trading days preceding January 1, 2021 by the average share value of the Company’s common stock over the 30 trading days beginning on January 1, 2018, with a deemed reinvestment of any dividends declared during the performance period. The Company’s peer group includes 49 companies which comprise the S&P Health Care Services Industry Index, which was selected by the compensation committee of the Company’s board of directors and includes a range of healthcare companies operating in several business segments.

Long Term Debt and Capital Lease Obligations

Senior Notes

On September 22, 2017, the Company completed the public offering of $400.0 million aggregate principal amount of its 4.400% Senior Notes due 2024 (the “Notes”). The Notes are governed by an indenture, dated as of September 22, 2017 (the “Base Indenture”), between the Company, as issuer, and U.S. Bank National Association, as trustee, as supplemented by a first supplemental indenture, dated as of September 22, 2017 (the “First Supplemental Indenture” together, with the Base Indenture, the “Indenture”), between the Company, as issuer, and U.S. Bank National Association, as trustee. The Notes were issued at a discount and had a carrying value of $399.3 million as of December 31, 2017 and September 30, 2018.

The Notes bear interest payable semiannually in cash in arrears on March 22 and September 22 of each year, commencing on March 22, 2018, which rate is subject to an interest rate adjustment upon the occurrence of certain credit rating events. The Notes mature on September 22, 2024. The Indenture provides that the Notes are redeemable at the Company’s option, in whole or in part, at any time on or after July 22, 2024, at a redemption price equal to 100% of the principal amount of the Notes being redeemed plus accrued and unpaid interest thereon to, but excluding, the redemption date.

The Indenture also contains certain covenants which restrict the Company’s ability to, among other things, create liens on its and its subsidiaries’ assets; engage in sale and lease-back transactions; and engage in a consolidation, merger or sale of assets.

Credit Agreement

On September 22, 2017, the Company entered into a credit agreement with various lenders that provides for a $400.0 million senior unsecured revolving credit facility and a $350.0 million senior unsecured term loan facility to the Company, as the borrower (the “2017 Credit Agreement”). On August 13, 2018, the Company entered into an amendment to the 2017 Credit Agreement, which extended the maturity date by one year. The 2017 Credit Agreement is scheduled to mature on September 22, 2023.

Under the 2017 Credit Agreement, the annual interest rate on the loan borrowing is equal to (i) in the case of base rate loans, the sum of an initial borrowing margin of 0.500 percent plus the higher of the prime rate, one-half of one percent in excess of the overnight “federal funds” rate, or the Eurodollar rate for one month plus 1.000 percent, or (ii) in the case of Eurodollar rate loans, the sum of an initial borrowing margin of 1.500 percent plus the Eurodollar rate for the selected interest period. The borrowing margin is subject to adjustment based on the Company’s debt rating as provided by certain rating agencies. The Company has the option to borrow in base rate loans or Eurodollar rate loans at its discretion. The commitment commission on the revolving credit facility under the 2017 Credit Agreement is 0.200 percent of the unused revolving credit commitment, which rate shall be subject to adjustment based on the Company’s debt rating as provided by certain rating agencies. For the nine months ended September 30, 2018, the weighted average interest rate was approximately 3.547 percent.

As of September 30, 2018, the contractual maturities of the term loan under the 2017 Credit Agreement were as follows: 2018—$4.4 million; 2019—$17.5 million; 2020—$17.5 million; 2021—$17.5 million; 2022—$17.5 million; and 2023—$258.1 million. Due to the timing of working capital needs, the Company will periodically borrow from the revolving loan under the 2017 Credit Agreement. At December 31, 2017 and September 30, 2018, the Company had revolving loan borrowings of $92.5 million and $40.0 million, respectively. At September 30, 2018, the Company had a borrowing capacity of $360.0 million under the 2017 Credit Agreement. Included in long-term debt, capital lease and deferred financing obligations are deferred loan and bond issuance costs as of December 31, 2017 and September 30, 2018 of $6.6 million and $6.1 million, respectively.

Letter of Credit Agreement

On August 22, 2017, the Company entered into a Continuing Agreement for Standby Letters of Credit with The Bank of Tokyo-Mitsubishi UFJ, Ltd. (“BTMU”), as issuer (the “L/C Agreement”), under which BTMU, at its sole discretion, may provide stand-by letter of credit to the Company. The Company had letters of credit outstanding under the L/C Agreement as of December 31, 2017 and September 30, 2018 of $26.5 million and $66.1 million, respectively.

Capital Lease Obligations

There were $22.9 million and $23.5 million of capital lease obligations at December 31, 2017 and September 30, 2018, respectively. The Company’s capital lease obligations represent amounts due under leases for certain properties, computer software and equipment.

Net Income per Common Share Attributable to Magellan Health, Inc.

9 Months Ended

Sep. 30, 2018

Net Income per Common Share Attributable to Magellan Health, Inc.

Net Income per Common Share Attributable to Magellan Health, Inc.

NOTE B—Net Income per Common Share Attributable to Magellan Health, Inc.

The following table reconciles income attributable to common shareholders (numerator) and shares (denominator) used in the computations of net income per share attributable to common shareholders (in thousands, except per share data) for the three and nine months ended September 30:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2018		2017		2018
Numerator:
Net income attributable to Magellan	$	32,451	$	27,145	$	55,698	$	52,148
Denominator:
Weighted average number of common shares outstanding—basic		23,282		24,433		23,135		24,451
Common stock equivalents—stock options		572		413		485		630
Common stock equivalents—RSAs		483		2		461		19
Common stock equivalents—RSUs		61		26		46		42
Common stock equivalents—PSUs		162		49		111		171
Common stock equivalents—employee stock purchase plan		3		5		3		3
Weighted average number of common shares outstanding—diluted		24,563		24,928		24,241		25,316
Net income attributable to Magellan per common share—basic	$	1.39	$	1.11	$	2.41	$	2.13
Net income attributable to Magellan per common share—diluted	$	1.32	$	1.09	$	2.30	$	2.06

The weighted average number of common shares outstanding for the nine months ended September 30, 2017 and 2018 were calculated using outstanding shares of the Company’s common stock. Common stock equivalents included in the calculation of diluted weighted average common shares outstanding for the nine months ended September 30, 2017 and 2018 represent stock options to purchase shares of the Company’s common stock, RSAs, RSUs, PSUs and stock purchased under the Employee Stock Purchase Plan.

The Company had additional potential dilutive securities outstanding representing 0.4 million and 0.6 million options for the three and nine months ended September 30, 2017, respectively, and 0.6 million and 0.4 million options for the three and nine months ended September 30, 2018, respectively, that were not included in the computation of dilutive securities because they were anti-dilutive for the period. Had these shares not been anti-dilutive, all of these shares would not have been included in the net income attributable to common shareholder per common share calculation as the Company uses the treasury stock method of calculating diluted shares.

Business Segment Information

9 Months Ended

Sep. 30, 2018

Business Segment Information

Business Segment Information

NOTE C—Business Segment Information

The accounting policies of the Company’s segments are the same as those described in Note A—“General.” The Company evaluates performance of its segments based on profit or loss from operations before stock compensation expense, depreciation and amortization, interest expense, interest and other income, changes in the fair value of contingent consideration recorded in relation to acquisitions, gain on sale of assets, special charges or benefits, and income taxes (“Segment Profit”). Management uses Segment Profit information for internal reporting and control purposes and considers it important in making decisions regarding the allocation of capital and other resources, risk assessment and employee compensation, among other matters. Healthcare subcontracts with Pharmacy Management to provide pharmacy benefits management services for certain of Healthcare’s customers. In addition, Pharmacy Management provides pharmacy benefits management for the Company’s employees covered under its medical plan. As such, revenue, cost of goods sold and direct service costs and other related to these arrangements are eliminated. The Company’s segments are defined in Note A—“General.”

The following tables summarize, for the periods indicated, operating results by business segment (in thousands):


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Three Months Ended September 30, 2017
Managed care and other revenue	$	769,451	$	65,131	$	(224)	$	834,358
PBM revenue		—		618,178		(33,130)		585,048
Cost of care		(569,306)		—		—		(569,306)
Cost of goods sold		—		(575,327)		31,645		(543,682)
Direct service costs and other		(143,550)		(74,976)		(8,846)		(227,372)
Stock compensation expense (1)		2,623		5,680		2,020		10,323
Changes in fair value of contingent consideration (1)		(834)		—		—		(834)
Less: non-controlling interest segment profit (loss) (2)		789		—		(1)		788
Segment profit (loss)	$	57,595	$	38,686	$	(8,534)	$	87,747


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Three Months Ended September 30, 2018
Managed care and other revenue	$	1,176,439	$	59,500	$	(152)	$	1,235,787
PBM revenue		—		665,734		(48,015)		617,719
Cost of care		(938,031)		—		—		(938,031)
Cost of goods sold		—		(618,463)		47,318		(571,145)
Direct service costs and other		(179,022)		(74,491)		(11,958)		(265,471)
Stock compensation expense (1)		2,165		1,359		5,796		9,320
Changes in fair value of contingent consideration (1)		148		—		—		148
Segment profit (loss)	$	61,699	$	33,639	$	(7,011)	$	88,327


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Nine Months Ended September 30, 2017
Managed care and other revenue	$	2,190,097	$	195,970	$	(670)	$	2,385,397
PBM revenue		—		1,856,856		(98,085)		1,758,771
Cost of care		(1,634,624)		—		—		(1,634,624)
Cost of goods sold		—		(1,742,610)		93,940		(1,648,670)
Direct service costs and other		(428,432)		(225,782)		(26,016)		(680,230)
Stock compensation expense (1)		8,388		17,094		6,352		31,834
Changes in fair value of contingent consideration (1)		(631)		—		—		(631)
Less: non-controlling interest segment profit (loss) (2)		(56)		—		(3)		(59)
Segment profit (loss)	$	134,854	$	101,528	$	(24,476)	$	211,906


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Nine Months Ended September 30, 2018
Managed care and other revenue	$	3,488,928	$	182,410	$	(448)	$	3,670,890
PBM revenue		—		1,940,726		(142,110)		1,798,616
Cost of care		(2,802,506)		—		—		(2,802,506)
Cost of goods sold		—		(1,827,327)		138,098		(1,689,229)
Direct service costs and other		(543,258)		(221,018)		(29,424)		(793,700)
Stock compensation expense (1)		7,857		4,252		15,296		27,405
Changes in fair value of contingent consideration (1)		451		—		—		451
Segment profit (loss)	$	151,472	$	79,043	$	(18,588)	$	211,927

(1)

Stock compensation expense, changes in the fair value of contingent consideration recorded in relation to acquisitions and impairment of intangible assets are included in direct service costs and other operating expenses; however, these amounts are excluded from the computation of Segment Profit.

(2)

The non‑controlling portion of AlphaCare’s segment profit (loss) is excluded from the computation of Segment Profit.

The following table reconciles income before income taxes to Segment Profit (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2018		2017		2018
Income before income taxes	$	44,975	$	40,961	$	84,838	$	70,713
Stock compensation expense		10,323		9,320		31,834		27,405
Changes in fair value of contingent consideration		(834)		148		(631)		451
Non-controlling interest segment (profit) loss		(788)		—		59		—
Depreciation and amortization		28,189		33,047		82,896		97,302
Interest expense		7,663		8,990		16,711		26,034
Interest and other income		(1,781)		(4,139)		(3,801)		(9,978)
Segment Profit	$	87,747	$	88,327	$	211,906	$	211,927

Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies

Commitments and Contingencies

NOTE D—Commitments and Contingencies

Legal

The Company’s operating activities entail significant risks of liability. From time to time, the Company is subject to various actions and claims arising from the acts or omissions of its employees, network providers or other parties. In the normal course of business, the Company receives reports relating to deaths and other serious incidents involving patients whose care is being managed by the Company. Such incidents occasionally give rise to malpractice, professional negligence and other related actions and claims against the Company or its network providers. Many of these actions and claims received by the Company seek substantial damages and therefore require the Company to incur significant fees and costs related to their defense.

The Company is also subject to or party to certain class actions and other litigation and claims relating to its operations or business practices. In the opinion of management, the Company has recorded reserves that are adequate to cover litigation, claims or assessments that have been or may be asserted against the Company, and for which the outcome is probable and reasonably estimable. Management believes that the resolution of such litigation and claims will not have a material adverse effect on the Company’s financial condition or results of operations; however, there can be no assurance in this regard.

Regulatory Issues

The managed healthcare industry is subject to numerous laws and regulations. The subjects of such laws and regulations cover, but are not limited to, matters such as licensure, accreditation, government healthcare program participation requirements, information privacy and security, reimbursement for patient services, and Medicare and Medicaid fraud and abuse. Over the past several years, government activity has increased with respect to investigations and/or allegations concerning possible violations of fraud and abuse and false claims statutes and/or regulations by healthcare organizations and insurers. Entities that are found to have violated these laws and regulations may be excluded from participating in government healthcare programs, subjected to fines or penalties or required to repay amounts received from the government for previously billed patient services. Compliance with such laws and regulations can be subject to future government review and interpretation, as well as regulatory actions unknown or unasserted at this time.

In addition, regulators of certain of the Company’s subsidiaries may exercise certain discretionary rights under regulations including increasing their supervision of such entities, requiring additional restricted cash or other security or seizing or otherwise taking control of the assets and operations of such subsidiaries.

The Company is subject to certain federal laws and regulations in connection with its contracts with the federal government. These laws and regulations affect how the Company conducts business with its federal agency customers and may impose added costs on its business. The Company’s failure to comply with federal procurement laws and regulations could cause it to lose business, incur additional costs and subject it to a variety of civil and criminal penalties and administrative sanctions, including termination of contracts, forfeiture of profits, harm to reputation, suspension of payments, fines, and suspension or debarment from doing business with federal government agencies. As previously disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, the Company’s wholly owned subsidiary, Armed Forces Services Corporation (“AFSC”), conducts business with federal agency customers and federal contractors to such agencies. The Company is investigating, with the assistance of outside counsel, matters relating to compliance by AFSC with Small Business Administration ( “SBA”) regulations and other federal laws applicable to government contractors and has reported findings to the SBA and the Department of Defense, including facts indicating violations of SBA regulations and other federal laws, such as the Anti-Kickback Act, by former AFSC executives, none of which was disclosed to Magellan prior to its acquisition of AFSC. The Company is voluntarily responding to government requests for further information regarding the Company’s investigation. Contingencies, if any, arising from the results of this investigation and self-reporting could require us to record balance sheet liabilities or accrue expenses, the amount of which we are not able to currently estimate. While the Company believes that it has responded appropriately by self-reporting findings regarding matters that incepted prior to its acquisition of AFSC in order to mitigate the risk of adverse consequences, should the SBA, Department of Defense and/or other federal agencies seek to hold the Company or AFSC responsible for the reported conduct, we may be required to pay damages and/or penalties and AFSC could be suspended or debarred from government contracting. AFSC generated approximately 3% and 2% of the Company’s total net revenues for the year ended December 31, 2017 and nine months ended September 30, 2018, respectively.

Stock Repurchases

On October 26, 2015, the Company’s board of directors approved a stock repurchase plan which authorized the Company to purchase up to $200 million of its outstanding common stock through October 26, 2017 (the “2015 Repurchase Program”). On July 26, 2017, the Company’s board of directors approved an extension of the 2015 Repurchase Program through October 26, 2018. On May 24, 2018, the Company’s board of directors approved an increase of $200 million to the current $200 million stock repurchase plan which will now authorize the Company to purchase up to $400 million of its outstanding common stock under the 2015 Repurchase Program. As of September 30, 2018, the remaining capacity under the 2015 Repurchase Program was $211.0 million. The board also extended the program from October 22, 2018 to October 22, 2020. Stock repurchases under the programs may be carried out from time to time in open market transactions (including blocks) or in privately negotiated transactions. The timing of repurchases and the actual amount purchased will depend on a variety of factors including the market price of the Company’s shares, general market and economic conditions, and other corporate considerations. Repurchases may be made pursuant to plans intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934, which could allow the Company to purchase its shares during periods when it otherwise might be prevented from doing so under insider trading laws or because of self-imposed trading blackout periods. Repurchases are expected to be funded from working capital and anticipated cash from operations. The repurchase authorization does not require the purchase of a specific number of shares and is subject to suspension or termination by the Company’s board of directors at any time.

Pursuant to the 2015 Stock Repurchase Program, the Company made purchases as follows (aggregate cost excludes broker commissions and is reflected in millions):


	Total Number	Average
	of Shares	Price Paid		Aggregate
Period	Purchased	per Share		Cost
October 26, 2015 - December 31, 2015	345,044	$	53.46	$	18.4
January 1, 2016 - December 31, 2016	1,828,183		58.40		106.8
January 1, 2017 - December 31, 2017	280,140		77.67		21.8
January 1, 2018 - September 30, 2018	514,669		81.67		42.0
	2,968,036			$	189.0

The Company made additional open market purchases of 165,039 shares of the Company’s common stock at an aggregate cost of $11.2 million (excluding broker commissions) during the period from October 1, 2018 through October 31, 2018.

Acquisitions	9 Months Ended
Acquisitions	Sep. 30, 2018
Acquisitions
Acquisitions	NOTE E—Acquisitions Acquisition of SWH Holdings, Inc. Pursuant to the July 13, 2017 Agreement and Plan of Merger (the “SWH Agreement”), on October 31, 2017 the Company acquired (the “SWH Acquisition”) all of the outstanding equity interests of SWH Holdings, Inc. (“SWH”). SWH is a healthcare company focused on serving complex, high-risk populations, providing Medicare and Medicaid dual-eligible benefits to members in Massachusetts and New York. As consideration for the SWH Acquisition, the Company paid $400.0 million in cash, inclusive of a $10.0 million payment based on SWH’s Medicare plan in Massachusetts receiving a Centers for Medicare & Medicaid Services 2018 Star Rating of at least 4, subject to adjustments as provided in the SWH Agreement. The Company’s estimated fair values of SWH’s assets acquired and liabilities assumed at the date of acquisition are determined based on certain valuations and analyses that have yet to be finalized, and accordingly, the assets acquired and liabilities assumed are subject to adjustment once the analyses are completed. In addition, the amount recognized for deferred tax liabilities may be impacted by the determination of these items. The Company will make appropriate adjustments to the purchase price allocation prior to the completion of the measurement period as required. During the nine months ended September 30, 2018, the Company made measurement period adjustments of $8.7 million to increase the goodwill related to the SWH acquisition. The measurement period adjustments were to increase current liabilities. The Company reports the results of operations of SWH in its Healthcare segment.

General (Policies)

9 Months Ended

Sep. 30, 2018

General.

Recent Accounting Pronouncements

The cumulative effect of changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASU 2014-09 were as follows (in thousands):


	Balance at December 31, 2017		Adjustments Due to ASC 606		Balance at January 1, 2018
Assets
Other current assets	$	72,323	$	(667)	$	71,656
Total Current Assets		1,483,353		(667)		1,482,686
Deferred income taxes		813		1,335		2,148
Other long-term assets		22,567		(1,333)		21,234
Total Assets		2,957,234		(665)		2,956,569

Liabilities and Stockholders' Equity
Accrued liabilities		193,635		(2,182)		191,453
Total Current Liabilities		892,303		(2,182)		890,121
Deferred credits and other long-term liabilities		19,100		5,744		24,844
Total Liabilities		1,680,740		3,562		1,684,302
Retained earnings		1,399,495		(4,227)		1,395,268
Total Stockholders' Equity		1,276,494		(4,227)		1,272,267
Total Liabilities and Stockholders' Equity		2,957,234		(665)		2,956,569

The impact of the adoption of ASC 606 on our consolidated balance sheet as of September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Assets
Accounts receivable	$	820,748	$	(12,119)	$	808,629
Other current assets		102,829		1,116		103,945
Total Current Assets		1,576,545		(11,003)		1,565,542
Other long-term assets		51,391		4,667		56,058
Total Assets		3,048,515		(6,336)		3,042,179

Liabilities and Stockholders' Equity
Accrued liabilities		209,012		(3,377)		205,635
Other medical liabilities		162,009		119		162,128
Total Current Liabilities		918,571		(3,258)		915,313
Deferred credits and other long-term liabilities		34,959		(7,380)		27,579
Total Liabilities		1,716,764		(10,638)		1,706,126
Retained earnings		1,447,416		4,302		1,451,718
Total Stockholders' Equity		1,331,751		4,302		1,336,053
Total Liabilities and Stockholders' Equity		3,048,515		(6,336)		3,042,179

The impact of the adoption of ASC 606 on our consolidated income statement for the three months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	1,235,787	$	(1,588)	$	1,234,199
PBM		617,719		(3,714)		614,005
Total net revenue		1,853,506		(5,302)		1,848,204
Cost of goods sold		571,145		651		571,796
Total costs and expenses		1,812,545		651		1,813,196
Income before income taxes		40,961		(5,953)		35,008
Provision for income taxes		13,816		(1,566)		12,250
Net income		27,145		(4,387)		22,758
Net income attributable to Magellan		27,145		(4,387)		22,758

The impact of the adoption of ASC 606 on our consolidated income statement for the nine months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	3,670,890	$	(5,543)	$	3,665,347
PBM		1,798,616		4,485		1,803,101
Total net revenue		5,469,506		(1,058)		5,468,448
Cost of goods sold		1,689,229		651		1,689,880
Total costs and expenses		5,398,793		651		5,399,444
Income before income taxes		70,713		(1,709)		69,004
Provision for income taxes		18,565		(449)		18,116
Net income		52,148		(1,260)		50,888
Net income attributable to Magellan		52,148		(1,260)		50,888

Use of Estimates

Revenue Recognition


	Three Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	377,615	$	—	$	(82)	$	377,533
EAP risk-based		79,854		—		—		79,854
ASO		65,326		9,143		(70)		74,399
Magellan Complete Care
Risk-based, non-EAP		639,584		—		—		639,584
ASO		14,060		—		—		14,060
PBM, including dispensing		—		549,508		(48,015)		501,493
Medicare Part D		—		116,226		—		116,226
PBA		—		33,158		—		33,158
Formulary management		—		16,601		—		16,601
Other		—		598		—		598
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Type of Customer
Government	$	874,135	$	238,175	$	—	$	1,112,310
Non-government		302,304		487,059		(48,167)		741,196
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	665,734	$	(48,015)	$	617,719
Transferred over time		1,176,439		59,500		(152)		1,235,787
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506


	Nine Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	1,128,743	$	—	$	(196)	$	1,128,547
EAP risk-based		265,787		—		—		265,787
ASO		189,241		24,972		(252)		213,961
Magellan Complete Care
Risk-based, non-EAP		1,863,771		—		—		1,863,771
ASO		41,386		—		—		41,386
PBM, including dispensing		—		1,619,431		(142,110)		1,477,321
Medicare Part D		—		321,295		—		321,295
PBA		—		99,792		—		99,792
Formulary management		—		55,326		—		55,326
Other		—		2,320		—		2,320
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Type of Customer
Government	$	2,585,525	$	696,172	$	—	$	3,281,697
Non-government		903,403		1,426,964		(142,558)		2,187,809
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	1,940,726	$	(142,110)	$	1,798,616
Transferred over time		3,488,928		182,410		(448)		3,670,890
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Accounts Receivable, Contract Assets and Contract Liabilities

Accounts receivable, contract assets and contract liabilities consisted of the following (in thousands, except percentages):


	January 1,		September 30,
	2018		2018		$ Change		% Change
Accounts receivable	$	679,269	$	864,860	$	185,591		27.3%
Contract assets		8,564		24,118		15,554		181.6%
Contract liabilities - current		14,299		21,536		7,237		50.6%
Contract liabilities - long-term		12,303		12,577		274		2.2%

Significant Customers

Customers exceeding ten percent of the consolidated Company’s net revenues

Customers exceeding ten percent of segment net revenues


Segment	Term Date	2017			2018

Healthcare
Customer A	(1)	$	131,539	*	$	534,483
Customer B	December 31, 2018 to December 31, 2020 (2)		—			506,204

Pharmacy Management
Customer C	March 31, 2019		266,795			259,514

Revenue amount did not exceed 10 percent of net revenues for the respective segment for the year presented. Amount is shown for comparative purposes only.

(1)

The Company, along with other participating managed care plans in this state, continues to provide services while a new contract is being finalized.

(2)

The customer has more than one contract. The individual contracts are scheduled to terminate at various points during the time period indicated above.

Concentration of Business

Fair Value Measurements

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.


	December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (1)	$	—	$	284,064	$	—	$	284,064
Investments:
U.S. Government and agency securities		28,231		—		—		28,231
Obligations of government-sponsored enterprises (2)		—		22,088		—		22,088
Corporate debt securities		—		269,788		—		269,788
Taxable municipal bonds		—		5,000		—		5,000
Certificates of deposit		—		2,758		—		2,758
Total assets held at fair value	$	28,231	$	583,698	$	—	$	611,929

Liabilities
Contingent consideration	$	—	$	—	$	8,817	$	8,817
Total liabilities held at fair value	$	—	$	—	$	8,817	$	8,817


	September 30, 2018
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (3)	$	—	$	213,295	$	—	$	213,295
Investments:
U.S. Government and agency securities		57,384		—		—		57,384
Obligations of government-sponsored enterprises (2)		—		7,965		—		7,965
Corporate debt securities		—		292,760		—		292,760
Certificates of deposit		—		20,650		—		20,650
Total assets held at fair value	$	57,384	$	534,670	$	—	$	592,054

Liabilities
Contingent consideration	$	—	$	—	$	9,268	$	9,268
Total liabilities held at fair value	$	—	$	—	$	9,268	$	9,268

(1)

Excludes $114.7 million of cash held in bank accounts by the Company.

(2)

Includes investments in notes issued by the Federal Home Loan Bank, Federal Farm Credit Banks and Federal National Mortgage Association.

(3)

Excludes $21.0 million of cash held in bank accounts by the Company.

For the nine months ended September 30, 2018, the Company has not transferred any assets between fair value measurement levels.

All of the Company’s investments are classified as “available-for-sale” and are carried at fair value.

The following table summarizes the Company’s liability for contingent consideration for the nine months ended September 30, 2018 (in thousands):


	September 30,
	2018
Balance as of beginning of period	$	8,817
Changes in fair value		451
Payments		—
Balance as of end of period	$	9,268

Cash and Cash Equivalents

Investments


	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	28,313	$	—	$	(82)	$	28,231
Obligations of government-sponsored enterprises (1)		22,139		—		(51)		22,088
Corporate debt securities		270,154		1		(367)		269,788
Taxable municipal bonds		5,000		—		—		5,000
Certificates of deposit		2,758		—		—		2,758
Total investments at December 31, 2017	$	328,364	$	1	$	(500)	$	327,865


	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	57,507	$	—	$	(123)	$	57,384
Obligations of government-sponsored enterprises (1)		8,009		—		(44)		7,965
Corporate debt securities		293,084		9		(333)		292,760
Certificates of deposit		20,650		—		—		20,650
Total investments at September 30, 2018	$	379,250	$	9	$	(500)	$	378,759

(1)

Includes investments in notes issued by the Federal Home Loan Bank, Federal National Mortgage Association and Federal Farm Credit Banks.

The maturity dates of the Company’s investments as of September 30, 2018 are summarized below (in thousands):


	Amortized		Estimated
	Cost		Fair Value
2018	$	65,167	$	65,132
2019		313,016		312,563
2020		1,067		1,064
Total investments at September 30, 2018	$	379,250	$	378,759

Income Taxes

Net Operating Loss Carryforwards

Health Care Reform

Stock Compensation

Summarized information related to the Company’s stock options for the nine months ended September 30, 2018 is as follows:


		Weighted
		Average
		Exercise
	Options	Price
Outstanding, beginning of period	2,458,237	$	61.50
Granted	451,456		98.45
Forfeited	(59,427)		77.53
Exercised	(400,869)		56.35
Outstanding, end of period	2,449,397	$	68.77
Vested and expected to vest at end of period	2,434,842	$	68.66
Exercisable, end of period	1,512,481	$	60.31

All of the Company’s options granted during the nine months ended September 30, 2018 vest ratably on each anniversary date over the three years subsequent to grant and have a ten year life.

Summarized information related to the Company’s nonvested restricted stock awards (“RSAs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	31,102	$	68.00
Awarded	11,795		89.05
Vested	(31,102)		68.00
Forfeited	—		—
Outstanding, ending of period	11,795		89.05

Summarized information related to the Company’s nonvested restricted stock units (“RSUs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	163,289	$	66.46
Awarded	111,033		99.29
Vested	(82,207)		65.54
Forfeited	(18,231)		83.93
Outstanding, ending of period	173,884		86.03

The vesting period for RSAs ranges from 12 months to 24 months. In general, RSUs vest ratably on each anniversary over the three years subsequent to grant.

Summarized information related to the Company’s nonvested restricted performance stock units (“PSUs”) for the nine months ended September 30, 2018 is as follows:


	2018
		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	202,315	$	84.63
Awarded	80,502		141.61
Vested	(33,592)		85.00
Forfeited	(1,865)		97.25
Outstanding, end of period	247,360		103.03

Long Term Debt and Capital Lease Obligations

Senior Notes

Credit Agreement

Letter of Credit Agreement

Capital Lease Obligations

General (Tables)

9 Months Ended

Sep. 30, 2018

General

Summary of impacts of adoption of ASC 606

The cumulative effect of changes made to our consolidated January 1, 2018 balance sheet for the adoption of ASU 2014-09 were as follows (in thousands):


	Balance at December 31, 2017		Adjustments Due to ASC 606		Balance at January 1, 2018
Assets
Other current assets	$	72,323	$	(667)	$	71,656
Total Current Assets		1,483,353		(667)		1,482,686
Deferred income taxes		813		1,335		2,148
Other long-term assets		22,567		(1,333)		21,234
Total Assets		2,957,234		(665)		2,956,569

Liabilities and Stockholders' Equity
Accrued liabilities		193,635		(2,182)		191,453
Total Current Liabilities		892,303		(2,182)		890,121
Deferred credits and other long-term liabilities		19,100		5,744		24,844
Total Liabilities		1,680,740		3,562		1,684,302
Retained earnings		1,399,495		(4,227)		1,395,268
Total Stockholders' Equity		1,276,494		(4,227)		1,272,267
Total Liabilities and Stockholders' Equity		2,957,234		(665)		2,956,569

The impact of the adoption of ASC 606 on our consolidated balance sheet as of September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Assets
Accounts receivable	$	820,748	$	(12,119)	$	808,629
Other current assets		102,829		1,116		103,945
Total Current Assets		1,576,545		(11,003)		1,565,542
Other long-term assets		51,391		4,667		56,058
Total Assets		3,048,515		(6,336)		3,042,179

Liabilities and Stockholders' Equity
Accrued liabilities		209,012		(3,377)		205,635
Other medical liabilities		162,009		119		162,128
Total Current Liabilities		918,571		(3,258)		915,313
Deferred credits and other long-term liabilities		34,959		(7,380)		27,579
Total Liabilities		1,716,764		(10,638)		1,706,126
Retained earnings		1,447,416		4,302		1,451,718
Total Stockholders' Equity		1,331,751		4,302		1,336,053
Total Liabilities and Stockholders' Equity		3,048,515		(6,336)		3,042,179

The impact of the adoption of ASC 606 on our consolidated income statement for the three months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	1,235,787	$	(1,588)	$	1,234,199
PBM		617,719		(3,714)		614,005
Total net revenue		1,853,506		(5,302)		1,848,204
Cost of goods sold		571,145		651		571,796
Total costs and expenses		1,812,545		651		1,813,196
Income before income taxes		40,961		(5,953)		35,008
Provision for income taxes		13,816		(1,566)		12,250
Net income		27,145		(4,387)		22,758
Net income attributable to Magellan		27,145		(4,387)		22,758

The impact of the adoption of ASC 606 on our consolidated income statement for the nine months ended September 30, 2018 was as follows (in thousands):


	As Reported		Adjustments		Balance Without ASC 606 Adoption
Managed care and other	$	3,670,890	$	(5,543)	$	3,665,347
PBM		1,798,616		4,485		1,803,101
Total net revenue		5,469,506		(1,058)		5,468,448
Cost of goods sold		1,689,229		651		1,689,880
Total costs and expenses		5,398,793		651		5,399,444
Income before income taxes		70,713		(1,709)		69,004
Provision for income taxes		18,565		(449)		18,116
Net income		52,148		(1,260)		50,888
Net income attributable to Magellan		52,148		(1,260)		50,888

Schedule of disaggregation of revenue by major service line, type of customer and timing of revenue recognition

The following tables disaggregate our revenue for the three and nine months ended September 30, 2018 by major service line, type of customer and timing of revenue recognition (in thousands):


	Three Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	377,615	$	—	$	(82)	$	377,533
EAP risk-based		79,854		—		—		79,854
ASO		65,326		9,143		(70)		74,399
Magellan Complete Care
Risk-based, non-EAP		639,584		—		—		639,584
ASO		14,060		—		—		14,060
PBM, including dispensing		—		549,508		(48,015)		501,493
Medicare Part D		—		116,226		—		116,226
PBA		—		33,158		—		33,158
Formulary management		—		16,601		—		16,601
Other		—		598		—		598
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Type of Customer
Government	$	874,135	$	238,175	$	—	$	1,112,310
Non-government		302,304		487,059		(48,167)		741,196
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	665,734	$	(48,015)	$	617,719
Transferred over time		1,176,439		59,500		(152)		1,235,787
Total net revenue	$	1,176,439	$	725,234	$	(48,167)	$	1,853,506


	Nine Months Ended September 30, 2018
	Healthcare		Pharmacy Management		Elimination		Total
Major Service Lines
Behavioral & Specialty Health
Risk-based, non-EAP	$	1,128,743	$	—	$	(196)	$	1,128,547
EAP risk-based		265,787		—		—		265,787
ASO		189,241		24,972		(252)		213,961
Magellan Complete Care
Risk-based, non-EAP		1,863,771		—		—		1,863,771
ASO		41,386		—		—		41,386
PBM, including dispensing		—		1,619,431		(142,110)		1,477,321
Medicare Part D		—		321,295		—		321,295
PBA		—		99,792		—		99,792
Formulary management		—		55,326		—		55,326
Other		—		2,320		—		2,320
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Type of Customer
Government	$	2,585,525	$	696,172	$	—	$	3,281,697
Non-government		903,403		1,426,964		(142,558)		2,187,809
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Timing of Revenue Recognition
Transferred at a point in time	$	—	$	1,940,726	$	(142,110)	$	1,798,616
Transferred over time		3,488,928		182,410		(448)		3,670,890
Total net revenue	$	3,488,928	$	2,123,136	$	(142,558)	$	5,469,506

Schedule of accounts receivable, contract assets and contract liabilities


	January 1,		September 30,
	2018		2018		$ Change		% Change
Accounts receivable	$	679,269	$	864,860	$	185,591		27.3%
Contract assets		8,564		24,118		15,554		181.6%
Contract liabilities - current		14,299		21,536		7,237		50.6%
Contract liabilities - long-term		12,303		12,577		274		2.2%

Schedule of customers generating in excess of ten percent of net revenues for respective segment


Segment	Term Date	2017			2018

Healthcare
Customer A	(1)	$	131,539	*	$	534,483
Customer B	December 31, 2018 to December 31, 2020 (2)		—			506,204

Pharmacy Management
Customer C	March 31, 2019		266,795			259,514

Revenue amount did not exceed 10 percent of net revenues for the respective segment for the year presented. Amount is shown for comparative purposes only.

(1)

The Company, along with other participating managed care plans in this state, continues to provide services while a new contract is being finalized.

The customer has more than one contract. The individual contracts are scheduled to terminate at various points during the time period indicated above.

Schedule of fair value of financial assets and liabilities


	December 31, 2017
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (1)	$	—	$	284,064	$	—	$	284,064
Investments:
U.S. Government and agency securities		28,231		—		—		28,231
Obligations of government-sponsored enterprises (2)		—		22,088		—		22,088
Corporate debt securities		—		269,788		—		269,788
Taxable municipal bonds		—		5,000		—		5,000
Certificates of deposit		—		2,758		—		2,758
Total assets held at fair value	$	28,231	$	583,698	$	—	$	611,929

Liabilities
Contingent consideration	$	—	$	—	$	8,817	$	8,817
Total liabilities held at fair value	$	—	$	—	$	8,817	$	8,817


	September 30, 2018
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents (3)	$	—	$	213,295	$	—	$	213,295
Investments:
U.S. Government and agency securities		57,384		—		—		57,384
Obligations of government-sponsored enterprises (2)		—		7,965		—		7,965
Corporate debt securities		—		292,760		—		292,760
Certificates of deposit		—		20,650		—		20,650
Total assets held at fair value	$	57,384	$	534,670	$	—	$	592,054

Liabilities
Contingent consideration	$	—	$	—	$	9,268	$	9,268
Total liabilities held at fair value	$	—	$	—	$	9,268	$	9,268

(1)

Excludes $114.7 million of cash held in bank accounts by the Company.

(2)

Includes investments in notes issued by the Federal Home Loan Bank, Federal Farm Credit Banks and Federal National Mortgage Association.

(3)

Excludes $21.0 million of cash held in bank accounts by the Company.

Summary of the Company's liability for contingent consideration

The following table summarizes the Company’s liability for contingent consideration for the nine months ended September 30, 2018 (in thousands):


	September 30,
	2018
Balance as of beginning of period	$	8,817
Changes in fair value		451
Payments		—
Balance as of end of period	$	9,268

Summary of short-term and long-term investments

The following is a summary of short‑term and long‑term investments at December 31, 2017 and September 30, 2018 (in thousands):


	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	28,313	$	—	$	(82)	$	28,231
Obligations of government-sponsored enterprises (1)		22,139		—		(51)		22,088
Corporate debt securities		270,154		1		(367)		269,788
Taxable municipal bonds		5,000		—		—		5,000
Certificates of deposit		2,758		—		—		2,758
Total investments at December 31, 2017	$	328,364	$	1	$	(500)	$	327,865


	September 30, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated
	Cost		Gains		Losses		Fair Value
U.S. Government and agency securities	$	57,507	$	—	$	(123)	$	57,384
Obligations of government-sponsored enterprises (1)		8,009		—		(44)		7,965
Corporate debt securities		293,084		9		(333)		292,760
Certificates of deposit		20,650		—		—		20,650
Total investments at September 30, 2018	$	379,250	$	9	$	(500)	$	378,759

(1)

Includes investments in notes issued by the Federal Home Loan Bank, Federal National Mortgage Association and Federal Farm Credit Banks.

Summary of maturity dates of investments

The maturity dates of the Company’s investments as of September 30, 2018 are summarized below (in thousands):


	Amortized		Estimated
	Cost		Fair Value
2018	$	65,167	$	65,132
2019		313,016		312,563
2020		1,067		1,064
Total investments at September 30, 2018	$	379,250	$	378,759

Schedule of stock option activity

Summarized information related to the Company’s stock options for the nine months ended September 30, 2018 is as follows:


		Weighted
		Average
		Exercise
	Options	Price
Outstanding, beginning of period	2,458,237	$	61.50
Granted	451,456		98.45
Forfeited	(59,427)		77.53
Exercised	(400,869)		56.35
Outstanding, end of period	2,449,397	$	68.77
Vested and expected to vest at end of period	2,434,842	$	68.66
Exercisable, end of period	1,512,481	$	60.31

Schedule of nonvested restricted stock award activity

Summarized information related to the Company’s nonvested restricted stock awards (“RSAs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	31,102	$	68.00
Awarded	11,795		89.05
Vested	(31,102)		68.00
Forfeited	—		—
Outstanding, ending of period	11,795		89.05

Schedule of nonvested restricted stock units

Summarized information related to the Company’s nonvested restricted stock units (“RSUs”) for the nine months ended September 30, 2018 is as follows:



		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	163,289	$	66.46
Awarded	111,033		99.29
Vested	(82,207)		65.54
Forfeited	(18,231)		83.93
Outstanding, ending of period	173,884		86.03

Schedule of nonvested restricted performance stock units

Summarized information related to the Company’s nonvested restricted performance stock units (“PSUs”) for the nine months ended September 30, 2018 is as follows:


	2018
		Weighted
		Average
		Grant Date
	Shares	Fair Value
Outstanding, beginning of period	202,315	$	84.63
Awarded	80,502		141.61
Vested	(33,592)		85.00
Forfeited	(1,865)		97.25
Outstanding, end of period	247,360		103.03

Net Income per Common Share Attributable to Magellan Health, Inc. (Tables)

9 Months Ended

Sep. 30, 2018

Net Income per Common Share Attributable to Magellan Health, Inc.

Schedule of computation of basic and diluted earnings per share


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2018		2017		2018
Numerator:
Net income attributable to Magellan	$	32,451	$	27,145	$	55,698	$	52,148
Denominator:
Weighted average number of common shares outstanding—basic		23,282		24,433		23,135		24,451
Common stock equivalents—stock options		572		413		485		630
Common stock equivalents—RSAs		483		2		461		19
Common stock equivalents—RSUs		61		26		46		42
Common stock equivalents—PSUs		162		49		111		171
Common stock equivalents—employee stock purchase plan		3		5		3		3
Weighted average number of common shares outstanding—diluted		24,563		24,928		24,241		25,316
Net income attributable to Magellan per common share—basic	$	1.39	$	1.11	$	2.41	$	2.13
Net income attributable to Magellan per common share—diluted	$	1.32	$	1.09	$	2.30	$	2.06

Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Business Segment Information

Schedule of operating results by business segment

The following tables summarize, for the periods indicated, operating results by business segment (in thousands):


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Three Months Ended September 30, 2017
Managed care and other revenue	$	769,451	$	65,131	$	(224)	$	834,358
PBM revenue		—		618,178		(33,130)		585,048
Cost of care		(569,306)		—		—		(569,306)
Cost of goods sold		—		(575,327)		31,645		(543,682)
Direct service costs and other		(143,550)		(74,976)		(8,846)		(227,372)
Stock compensation expense (1)		2,623		5,680		2,020		10,323
Changes in fair value of contingent consideration (1)		(834)		—		—		(834)
Less: non-controlling interest segment profit (loss) (2)		789		—		(1)		788
Segment profit (loss)	$	57,595	$	38,686	$	(8,534)	$	87,747


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Three Months Ended September 30, 2018
Managed care and other revenue	$	1,176,439	$	59,500	$	(152)	$	1,235,787
PBM revenue		—		665,734		(48,015)		617,719
Cost of care		(938,031)		—		—		(938,031)
Cost of goods sold		—		(618,463)		47,318		(571,145)
Direct service costs and other		(179,022)		(74,491)		(11,958)		(265,471)
Stock compensation expense (1)		2,165		1,359		5,796		9,320
Changes in fair value of contingent consideration (1)		148		—		—		148
Segment profit (loss)	$	61,699	$	33,639	$	(7,011)	$	88,327


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Nine Months Ended September 30, 2017
Managed care and other revenue	$	2,190,097	$	195,970	$	(670)	$	2,385,397
PBM revenue		—		1,856,856		(98,085)		1,758,771
Cost of care		(1,634,624)		—		—		(1,634,624)
Cost of goods sold		—		(1,742,610)		93,940		(1,648,670)
Direct service costs and other		(428,432)		(225,782)		(26,016)		(680,230)
Stock compensation expense (1)		8,388		17,094		6,352		31,834
Changes in fair value of contingent consideration (1)		(631)		—		—		(631)
Less: non-controlling interest segment profit (loss) (2)		(56)		—		(3)		(59)
Segment profit (loss)	$	134,854	$	101,528	$	(24,476)	$	211,906


					Corporate
			Pharmacy		and
	Healthcare		Management		Elimination		Consolidated
Nine Months Ended September 30, 2018
Managed care and other revenue	$	3,488,928	$	182,410	$	(448)	$	3,670,890
PBM revenue		—		1,940,726		(142,110)		1,798,616
Cost of care		(2,802,506)		—		—		(2,802,506)
Cost of goods sold		—		(1,827,327)		138,098		(1,689,229)
Direct service costs and other		(543,258)		(221,018)		(29,424)		(793,700)
Stock compensation expense (1)		7,857		4,252		15,296		27,405
Changes in fair value of contingent consideration (1)		451		—		—		451
Segment profit (loss)	$	151,472	$	79,043	$	(18,588)	$	211,927

(1)

(2)

The non‑controlling portion of AlphaCare’s segment profit (loss) is excluded from the computation of Segment Profit.

Schedule of reconciliation of Segment Profit to income before income taxes

The following table reconciles income before income taxes to Segment Profit (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2018		2017		2018
Income before income taxes	$	44,975	$	40,961	$	84,838	$	70,713
Stock compensation expense		10,323		9,320		31,834		27,405
Changes in fair value of contingent consideration		(834)		148		(631)		451
Non-controlling interest segment (profit) loss		(788)		—		59		—
Depreciation and amortization		28,189		33,047		82,896		97,302
Interest expense		7,663		8,990		16,711		26,034
Interest and other income		(1,781)		(4,139)		(3,801)		(9,978)
Segment Profit	$	87,747	$	88,327	$	211,906	$	211,927

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

October 2015 Share Repurchase Program

Schedule of stock repurchases made

Pursuant to the 2015 Stock Repurchase Program, the Company made purchases as follows (aggregate cost excludes broker commissions and is reflected in millions):


	Total Number	Average
	of Shares	Price Paid		Aggregate
Period	Purchased	per Share		Cost
October 26, 2015 - December 31, 2015	345,044	$	53.46	$	18.4
January 1, 2016 - December 31, 2016	1,828,183		58.40		106.8
January 1, 2017 - December 31, 2017	280,140		77.67		21.8
January 1, 2018 - September 30, 2018	514,669		81.67		42.0
	2,968,036			$	189.0

General – Business Overview (Details)	9 Months Ended
General – Business Overview (Details)	Sep. 30, 2018 segment
Operating results by business segment
Number of segments	3
Healthcare
Operating results by business segment
Number of reporting units	2

General – Cumulative Effect of Changes for Adoption of ASU 2014-09 (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Other current assets	$ 102,829	$ 71,656	$ 72,323
Total Current Assets	1,576,545	1,482,686	1,483,353
Deferred income taxes	1,071	2,148	813
Other long-term assets	51,391	21,234	22,567
Total Assets	3,048,515	2,956,569	2,957,234
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities	209,012	191,453	193,635
Total Current Liabilities	918,571	890,121	892,303
Deferred credits and other long-term liabilities	34,959	24,844	19,100
Total Liabilities	1,716,764	1,684,302	1,680,740
Retained earnings	1,447,416	1,395,268	1,399,495
Total Stockholders' Equity	1,331,751	1,272,267	1,276,494
Total Liabilities and Stockholders' Equity	3,048,515	2,956,569	$ 2,957,234
Adjustments \| ASU 2014-09
Assets
Other current assets	1,116	(667)
Total Current Assets	(11,003)	(667)
Deferred income taxes		1,335
Other long-term assets	4,667	(1,333)
Total Assets	(6,336)	(665)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities	(3,377)	(2,182)
Total Current Liabilities	(3,258)	(2,182)
Deferred credits and other long-term liabilities	(7,380)	5,744
Total Liabilities	(10,638)	3,562
Retained earnings	4,302	(4,227)
Total Stockholders' Equity	4,302	(4,227)
Total Liabilities and Stockholders' Equity	$ (6,336)	$ (665)

General – Impact of Adoption of ASC 606 on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Accounts receivable	$ 820,748		$ 660,775
Other current assets	102,829	$ 71,656	72,323
Total Current Assets	1,576,545	1,482,686	1,483,353
Other long-term assets	51,391	21,234	22,567
Total Assets	3,048,515	2,956,569	2,957,234
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities	209,012	191,453	193,635
Other medical liabilities	162,009		177,002
Total Current Liabilities	918,571	890,121	892,303
Deferred credits and other long-term liabilities	34,959	24,844	19,100
Total Liabilities	1,716,764	1,684,302	1,680,740
Retained earnings	1,447,416	1,395,268	1,399,495
Total Stockholders' Equity	1,331,751	1,272,267	1,276,494
Total Liabilities and Stockholders' Equity	3,048,515	2,956,569	$ 2,957,234
ASU 2014-09 \| Adjustments
Assets
Accounts receivable	(12,119)
Other current assets	1,116	(667)
Total Current Assets	(11,003)	(667)
Other long-term assets	4,667	(1,333)
Total Assets	(6,336)	(665)
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities	(3,377)	(2,182)
Other medical liabilities	119
Total Current Liabilities	(3,258)	(2,182)
Deferred credits and other long-term liabilities	(7,380)	5,744
Total Liabilities	(10,638)	3,562
Retained earnings	4,302	(4,227)
Total Stockholders' Equity	4,302	(4,227)
Total Liabilities and Stockholders' Equity	(6,336)	$ (665)
ASU 2014-09 \| Balance Without ASC 606 Adoption
Assets
Accounts receivable	808,629
Other current assets	103,945
Total Current Assets	1,565,542
Other long-term assets	56,058
Total Assets	3,042,179
LIABILITIES AND STOCKHOLDERS' EQUITY
Accrued liabilities	205,635
Other medical liabilities	162,128
Total Current Liabilities	915,313
Deferred credits and other long-term liabilities	27,579
Total Liabilities	1,706,126
Retained earnings	1,451,718
Total Stockholders' Equity	1,336,053
Total Liabilities and Stockholders' Equity	$ 3,042,179

General – Impact of Adoption of ASC 606 on Consolidated Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating results by business segment
Net revenue	$ 1,853,506	$ 1,419,406	$ 5,469,506	$ 4,144,168
Cost of goods sold	571,145	543,682	1,689,229	1,648,670
Total costs and expenses	1,812,545	1,374,431	5,398,793	4,059,330
Income before income taxes	40,961	44,975	70,713	84,838
Provision for income taxes	13,816	11,739	18,565	29,206
Net income	27,145	33,236	52,148	55,632
Net income attributable to Magellan	27,145	32,451	52,148	55,698
Managed care and other
Operating results by business segment
Net revenue	1,235,787	834,358	3,670,890	2,385,397
PBM
Operating results by business segment
Net revenue	617,719	$ 585,048	1,798,616	$ 1,758,771
ASU 2014-09 \| Adjustments
Operating results by business segment
Net revenue	(5,302)		(1,058)
Cost of goods sold	651		651
Total costs and expenses	651		651
Income before income taxes	(5,953)		(1,709)
Provision for income taxes	(1,566)		(449)
Net income	(4,387)		(1,260)
Net income attributable to Magellan	(4,387)		(1,260)
ASU 2014-09 \| Adjustments \| Managed care and other
Operating results by business segment
Net revenue	(1,588)		(5,543)
ASU 2014-09 \| Adjustments \| PBM
Operating results by business segment
Net revenue	(3,714)		4,485
ASU 2014-09 \| Balance Without ASC 606 Adoption
Operating results by business segment
Net revenue	1,848,204		5,468,448
Cost of goods sold	571,796		1,689,880
Total costs and expenses	1,813,196		5,399,444
Income before income taxes	35,008		69,004
Provision for income taxes	12,250		18,116
Net income	22,758		50,888
Net income attributable to Magellan	22,758		50,888
ASU 2014-09 \| Balance Without ASC 606 Adoption \| Managed care and other
Operating results by business segment
Net revenue	1,234,199		3,665,347
ASU 2014-09 \| Balance Without ASC 606 Adoption \| PBM
Operating results by business segment
Net revenue	$ 614,005		$ 1,803,101

General – Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Operating results by business segment
Net revenue	$ 1,853,506	$ 5,469,506
Transferred at a point in time
Operating results by business segment
Net revenue	617,719	1,798,616
Transferred over time
Operating results by business segment
Net revenue	1,235,787	3,670,890
PBM, including dispensing
Operating results by business segment
Net revenue	501,493	1,477,321
Medicare Part D
Operating results by business segment
Net revenue	116,226	321,295
PBA
Operating results by business segment
Net revenue	33,158	99,792
Formulary management
Operating results by business segment
Net revenue	16,601	55,326
Other service lines
Operating results by business segment
Net revenue	598	2,320
Behavioral & Specialty Health \| Risk-based, non-EAP
Operating results by business segment
Net revenue	377,533	1,128,547
Behavioral & Specialty Health \| EAP risk-based
Operating results by business segment
Net revenue	79,854	265,787
Behavioral & Specialty Health \| ASO
Operating results by business segment
Net revenue	74,399	213,961
Magellan Complete Care \| Risk-based, non-EAP
Operating results by business segment
Net revenue	639,584	1,863,771
Magellan Complete Care \| ASO
Operating results by business segment
Net revenue	14,060	41,386
Government
Operating results by business segment
Net revenue	1,112,310	3,281,697
Non-government
Operating results by business segment
Net revenue	741,196	2,187,809
Healthcare
Operating results by business segment
Net revenue	1,176,439	3,488,928
Healthcare \| Transferred over time
Operating results by business segment
Net revenue	1,176,439	3,488,928
Healthcare \| Behavioral & Specialty Health \| Risk-based, non-EAP
Operating results by business segment
Net revenue	377,615	1,128,743
Healthcare \| Behavioral & Specialty Health \| EAP risk-based
Operating results by business segment
Net revenue	79,854	265,787
Healthcare \| Behavioral & Specialty Health \| ASO
Operating results by business segment
Net revenue	65,326	189,241
Healthcare \| Magellan Complete Care \| Risk-based, non-EAP
Operating results by business segment
Net revenue	639,584	1,863,771
Healthcare \| Magellan Complete Care \| ASO
Operating results by business segment
Net revenue	14,060	41,386
Healthcare \| Government
Operating results by business segment
Net revenue	874,135	2,585,525
Healthcare \| Non-government
Operating results by business segment
Net revenue	302,304	903,403
Pharmacy Management
Operating results by business segment
Net revenue	725,234	2,123,136
Pharmacy Management \| Transferred at a point in time
Operating results by business segment
Net revenue	665,734	1,940,726
Pharmacy Management \| Transferred over time
Operating results by business segment
Net revenue	59,500	182,410
Pharmacy Management \| PBM, including dispensing
Operating results by business segment
Net revenue	549,508	1,619,431
Pharmacy Management \| Medicare Part D
Operating results by business segment
Net revenue	116,226	321,295
Pharmacy Management \| PBA
Operating results by business segment
Net revenue	33,158	99,792
Pharmacy Management \| Formulary management
Operating results by business segment
Net revenue	16,601	55,326
Pharmacy Management \| Other service lines
Operating results by business segment
Net revenue	598	2,320
Pharmacy Management \| Behavioral & Specialty Health \| ASO
Operating results by business segment
Net revenue	9,143	24,972
Pharmacy Management \| Government
Operating results by business segment
Net revenue	238,175	696,172
Pharmacy Management \| Non-government
Operating results by business segment
Net revenue	487,059	1,426,964
Elimination
Operating results by business segment
Net revenue	(48,167)	(142,558)
Elimination \| Transferred at a point in time
Operating results by business segment
Net revenue	(48,015)	(142,110)
Elimination \| Transferred over time
Operating results by business segment
Net revenue	(152)	(448)
Elimination \| PBM, including dispensing
Operating results by business segment
Net revenue	(48,015)	(142,110)
Elimination \| Behavioral & Specialty Health \| Risk-based, non-EAP
Operating results by business segment
Net revenue	(82)	(196)
Elimination \| Behavioral & Specialty Health \| ASO
Operating results by business segment
Net revenue	(70)	(252)
Elimination \| Non-government
Operating results by business segment
Net revenue	$ (48,167)	$ (142,558)

General - Accounts Receivable, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Jan. 01, 2018
General
Accounts receivable	$ 864,860	$ 864,860	$ 679,269
Change in accounts receivable (in dollars)		$ 185,591
Change in accounts receivable (as a percent)		27.30%
Contract assets	24,118	$ 24,118	8,564
Change in contract assets (in dollars)		$ 15,554
Change in contract assets (as a percent)		181.60%
Contract liabilities - current	21,536	$ 21,536	14,299
Change in contract liabilities - current (in dollars)		$ 7,237
Change in contract liabilities - current (as a percent)		50.60%
Contract liabilities - long-term	12,577	$ 12,577	$ 12,303
Change in contract liabilities - long-term (in dollars)		$ 274
Change in contract liabilities - long-term (as a percent)		2.20%
Revenue recognized previously included in current contract liabilities	59,200	$ 11,300
Revenue recognized related to performance obligations satisfied, or partially satisfied, in previous periods	$ 18,400	$ 21,600

General - Estimated Timing of Recognition of Amounts Included in Contract Liabilities (Details) $ in Millions	Sep. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Estimated revenue to be recognized	$ 12.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Estimated revenue to be recognized	$ 9.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Estimated revenue to be recognized	$ 3.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	0 months
Estimated revenue to be recognized	$ 8.7

General - Customers Exceeding Ten Percent of Consolidated Net Revenues (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) contract	Sep. 30, 2017 USD ($)
Operating results by business segment
Revenues	$ 1,853,506	$ 1,419,406	$ 5,469,506	$ 4,144,168
Florida Contract
Operating results by business segment
Termination notice			1 day
Termination notice period without cause			30 days
Revenues			$ 482,400	457,700
Regions 2, 6, 9, 10 and 11
Operating results by business segment
Percentage of total current membership under the existing Florida Contract	60.00%		60.00%
Healthcare \| Customer A
Operating results by business segment
Revenues			$ 534,483	131,539
Healthcare \| Customer B
Operating results by business segment
Revenues			$ 506,204
Healthcare \| Customer B \| Minimum
Operating results by business segment
Number of contracts \| contract			1
Pharmacy Management \| Customer C
Operating results by business segment
Revenues			$ 259,514	$ 266,795

General - Concentration of Business (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Operating results by business segment
Revenues	$ 1,853,506	$ 1,419,406	$ 5,469,506	$ 4,144,168
Accounts receivable, net	820,748		$ 820,748		$ 660,775
Minimum
Operating results by business segment
Term of contracts with customers			1 year
Term of renewal contracts			1 year
Notice period for termination of contract			30 days
Maximum
Operating results by business segment
Term of contracts with customers			3 years
Term of renewal contracts			2 years
Notice period for termination of contract			180 days
Pennsylvania Counties
Operating results by business segment
Revenues			$ 410,900	357,300
CMS
Operating results by business segment
Revenues			321,300	368,200
Accounts receivable, net	$ 139,100		139,100		$ 131,500
United States federal government
Operating results by business segment
Revenues			$ 235,300	$ 257,700

General - Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Investments	$ 378,759	$ 327,865
Cash held in bank accounts	21,000	114,700
Liabilities
Contingent consideration	9,268	8,817
U.S. Government and agency securities
Assets
Investments	57,384	28,231
Obligations of government-sponsored enterprises
Assets
Investments	7,965	22,088
Corporate debt securities
Assets
Investments	292,760	269,788
Taxable municipal bonds
Assets
Investments		5,000
Certificates of deposit
Assets
Investments	20,650	2,758
Level 1 \| 4.400% Senior Notes due 2024
Liabilities
Fair value of debt	387,200
Level 2 \| Term Loan
Liabilities
Fair value of debt	332,500
Fair value measured on recurring basis
Assets
Total assets held at fair value	592,054	611,929
Liabilities
Contingent consideration	9,268	8,817
Total liabilities held at fair value	9,268	8,817
Fair value measured on recurring basis \| Other than cash held in bank accounts by Company
Assets
Cash and cash equivalents	213,295	284,064
Fair value measured on recurring basis \| U.S. Government and agency securities
Assets
Investments	57,384	28,231
Fair value measured on recurring basis \| Obligations of government-sponsored enterprises
Assets
Investments	7,965	22,088
Fair value measured on recurring basis \| Corporate debt securities
Assets
Investments	292,760	269,788
Fair value measured on recurring basis \| Taxable municipal bonds
Assets
Investments		5,000
Fair value measured on recurring basis \| Certificates of deposit
Assets
Investments	20,650	2,758
Fair value measured on recurring basis \| Level 1
Assets
Total assets held at fair value	57,384	28,231
Fair value measured on recurring basis \| Level 1 \| U.S. Government and agency securities
Assets
Investments	57,384	28,231
Fair value measured on recurring basis \| Level 2
Assets
Total assets held at fair value	534,670	583,698
Fair value measured on recurring basis \| Level 2 \| Other than cash held in bank accounts by Company
Assets
Cash and cash equivalents	213,295	284,064
Fair value measured on recurring basis \| Level 2 \| Obligations of government-sponsored enterprises
Assets
Investments	7,965	22,088
Fair value measured on recurring basis \| Level 2 \| Corporate debt securities
Assets
Investments	292,760	269,788
Fair value measured on recurring basis \| Level 2 \| Taxable municipal bonds
Assets
Investments		5,000
Fair value measured on recurring basis \| Level 2 \| Certificates of deposit
Assets
Investments	20,650	2,758
Fair value measured on recurring basis \| Level 3
Liabilities
Contingent consideration	9,268	8,817
Total liabilities held at fair value	$ 9,268	$ 8,817

General - Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017
Fair value measurement of contingent consideration
Estimated undiscounted future contingent payments	$ 9,800		$ 9,800				$ 9,900
Fair value of short-term contingent consideration	7,131		7,131				6,892
Fair value of long-term contingent consideration	2,137		2,137				$ 1,925
Liability for contingent consideration
Balance as of beginning of period			8,817
Changes in fair value	148	$ (834)	451	$ (631)
Balance as of end of period	$ 9,268		$ 9,268
Forecast
Fair value measurement of contingent consideration
Estimated undiscounted future contingent payments					$ 2,600	$ 7,200

General - Investments (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
General - Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Short-term and long-term investments
Other-than-temporary unrealized losses	$ 0		$ 0
Realized gains or losses	0	$ 0
Amortized Cost	379,250		328,364
Gross Unrealized Gains	9		1
Gross Unrealized Losses	(500)		(500)
Estimated Fair Value	378,759		327,865
U.S. Government and agency securities
Short-term and long-term investments
Amortized Cost	57,507		28,313
Gross Unrealized Losses	(123)		(82)
Estimated Fair Value	57,384		28,231
Obligations of government-sponsored enterprises
Short-term and long-term investments
Amortized Cost	8,009		22,139
Gross Unrealized Losses	(44)		(51)
Estimated Fair Value	7,965		22,088
Corporate debt securities
Short-term and long-term investments
Amortized Cost	293,084		270,154
Gross Unrealized Gains	9		1
Gross Unrealized Losses	(333)		(367)
Estimated Fair Value	292,760		269,788
Taxable municipal bonds
Short-term and long-term investments
Amortized Cost			5,000
Estimated Fair Value			5,000
Certificates of deposit
Short-term and long-term investments
Amortized Cost	20,650		2,758
Estimated Fair Value	$ 20,650		$ 2,758

General - Investments by Maturity Date (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost
Investments amortized cost maturity dates 2018	$ 65,167
Investments amortized cost maturity dates 2019	313,016
Investment amortized cost maturity dates 2020	1,067
Amortized Cost	379,250	$ 328,364
Estimated Fair Value
Investments fair value maturity dates 2018	65,132
Investments fair value maturity dates 2019	312,563
Investments fair value maturity dates 2020	1,064
Estimated Fair Value	$ 378,759	$ 327,865

General - Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
General - Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Taxes
Effective income tax rates (as a percent)		26.30%	34.40%
Statutory federal income tax rate (as a percent)		21.00%		35.00%
Tax contingency reserves reversed in the Current Year Quarter	$ 2.0	$ 2.0
Accrued interest reversed	0.2
Deferred Tax Assets, Valuation Allowance	2.4	2.4		$ 2.4
Deferred tax assets
Income Taxes
Tax contingency reserves reversed in the Current Year Quarter	0.4	0.4
Income tax expense
Income Taxes
Tax contingency reserves reversed in the Current Year Quarter	1.6	1.6
Federal
Income Taxes
Taxes paid in resolution of examination	0.3	0.3
Operating Loss Carryforwards	38.1	38.1
State
Income Taxes
Operating Loss Carryforwards	93.7	93.7
AlphaCare \| Federal
Income Taxes
Operating Loss Carryforwards	$ 36.9	$ 36.9

General - Stock Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) company $ / shares shares	Sep. 30, 2017 USD ($)
Stock options, Non vested restricted stock awards and nonvested restricted stock units
Stock compensation expense \| $	$ 9,320	$ 10,323	$ 27,405	$ 31,834
Benefits of tax deductions in excess of recognized stock compensation expense \| $			$ 5,000	$ 3,700
Minimum
Stock options, Non vested restricted stock awards and nonvested restricted stock units
Estimated forfeitures (as a percent)	0.00%	0.00%	0.00%	0.00%
Maximum
Stock options, Non vested restricted stock awards and nonvested restricted stock units
Estimated forfeitures (as a percent)	4.00%	4.00%	4.00%	4.00%
Stock options
Stock options, Non vested restricted stock awards and nonvested restricted stock units
Grants in period, weighted average grant date fair value (in dollars per share)			$ 25.86
Expected volatility (as a percent)			28.21%
Stock option activity
Outstanding, beginning of period (in shares) \| shares			2,458,237
Granted (in shares) \| shares			451,456
Forfeited (in shares) \| shares			(59,427)
Exercised (in shares) \| shares			(400,869)
Outstanding, end of period (in shares) \| shares	2,449,397		2,449,397
Vested and expected to vest end of period (in shares) \| shares	2,434,842		2,434,842
Exercisable, end of period (in shares) \| shares	1,512,481		1,512,481
Weighted average exercise price of stock options
Outstanding, beginning of period (in dollars per share)			$ 61.50
Granted (in dollars per share)			98.45
Forfeited (in dollars per share)			77.53
Exercised (in dollars per share)			56.35
Outstanding, end of period (in dollars per share)	$ 68.77		68.77
Vested and expected to vest end of period (in dollars per share)	68.66		68.66
Exercisable, end of period (in dollars per share)	$ 60.31		$ 60.31
Assumptions used for estimating value of awards granted
Vesting period			3 years
Life of options (Expiration period)			10 years
Restricted stock awards
Nonvested restricted stock awards and units
Outstanding, beginning of period (in shares) \| shares			31,102
Awarded (in shares) \| shares			11,795
Vested (in shares) \| shares			(31,102)
Outstanding, end of period (in shares) \| shares	11,795		11,795
Weighted average exercise price of nonvested restricted stock award and units
Outstanding, beginning of period (in dollars per share)			$ 68.00
Awarded (in dollars per share)			89.05
Vested (in dollars per share)			68.00
Outstanding, end of period (in dollars per share)	$ 89.05		$ 89.05
Restricted stock awards \| Minimum
Assumptions used for estimating value of awards granted
Vesting period			12 months
Restricted stock awards \| Maximum
Assumptions used for estimating value of awards granted
Vesting period			24 months
Restricted Stock Units (RSUs)
Nonvested restricted stock awards and units
Outstanding, beginning of period (in shares) \| shares			163,289
Awarded (in shares) \| shares			111,033
Vested (in shares) \| shares			(82,207)
Forfeited (in shares) \| shares			(18,231)
Outstanding, end of period (in shares) \| shares	173,884		173,884
Weighted average exercise price of nonvested restricted stock award and units
Outstanding, beginning of period (in dollars per share)			$ 66.46
Awarded (in dollars per share)			99.29
Vested (in dollars per share)			65.54
Forfeited (in dollars per share)			83.93
Outstanding, end of period (in dollars per share)	$ 86.03		$ 86.03
Assumptions used for estimating value of awards granted
Vesting period			3 years
Performance Based Restricted Stock Units (“PSUs”)
Nonvested restricted stock awards and units
Outstanding, beginning of period (in shares) \| shares			202,315
Awarded (in shares) \| shares			80,502
Vested (in shares) \| shares			(33,592)
Forfeited (in shares) \| shares			(1,865)
Outstanding, end of period (in shares) \| shares	247,360		247,360
Weighted average exercise price of nonvested restricted stock award and units
Outstanding, beginning of period (in dollars per share)			$ 84.63
Awarded (in dollars per share)			141.61
Vested (in dollars per share)			85.00
Forfeited (in dollars per share)			97.25
Outstanding, end of period (in dollars per share)	$ 103.03		$ 103.03
Assumptions used for estimating value of awards granted
Vesting period			3 years
Expected dividend yield (as a percent)			0.00%
Risk-free interest rate (as a percent)			2.37%
Expected volatility, minimum (as a percent)			20.00%
Expected volatility, maximum (as a percent)			82.00%
Expected volatility, average (as a percent)			35.00%
Number of trading days considered for average share value			30 days
Number of companies in peer group \| company			49
Performance Based Restricted Stock Units (“PSUs”) \| Minimum
Assumptions used for estimating value of awards granted
Percentage of shares to be settled			0.00%
Performance Based Restricted Stock Units (“PSUs”) \| Maximum
Assumptions used for estimating value of awards granted
Percentage of shares to be settled			200.00%

General - Long Term Debt and Capital Lease Obligation (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 22, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Long-term Debt and Capital Lease Obligations
Proceeds from issuance of debt			$ 949,239
Debt disclosures
Capital lease obligations		$ 23,500		$ 22,900
Deferred loan issuance cost		6,100		6,600
4.400% Senior Notes due 2024
Long-term Debt and Capital Lease Obligations
Aggregate principal amount of Senior Notes	$ 400,000	399,300		399,300
Stated interest rate (as a percent)	4.40%
Redemption price as a percentage of the principal amount being redeemed	100.00%
2017 Credit Agreement
Debt disclosures
Revolving borrowings outstanding		40,000		92,500
Available borrowing capacity		$ 360,000
2017 Credit Agreement \| Revolving Loan borrowings
Long-term Debt and Capital Lease Obligations
Maximum borrowing capacity	$ 400,000
Commitment commission (as a percent)		0.20%
2017 Credit Agreement \| Term Loan
Long-term Debt and Capital Lease Obligations
Maximum borrowing capacity	$ 350,000
Weighted average interest rate (as a percent)		3.547%
Long-term Debt, Fiscal Year Maturity
2018		$ 4,400
2019		17,500
2020		17,500
2021		17,500
2022		17,500
2023		258,100
2017 Credit Agreement \| Prime rate
Long-term Debt and Capital Lease Obligations
Basis spread on variable rate (as a percent)	0.50%
2017 Credit Agreement \| Overnight Federal Funds rate
Long-term Debt and Capital Lease Obligations
Basis spread on variable rate (as a percent)	0.50%
2017 Credit Agreement \| Eurodollar rate for one month
Long-term Debt and Capital Lease Obligations
Basis spread on variable rate (as a percent)	1.00%
2017 Credit Agreement \| Eurodollar rate for selected interest period
Long-term Debt and Capital Lease Obligations
Basis spread on variable rate (as a percent)	1.50%
Standby Letters of Credit with The Bank Of Tokyo-Mitsubishi UFJ, Ltd.
Debt disclosures
Letters of credit outstanding		$ 66,100		$ 26,500

Net Income per Common Share Attributable to Magellan Health, Inc (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income attributable to Magellan	$ 27,145	$ 32,451	$ 52,148	$ 55,698
Denominator:
Weighted average number of common shares outstanding-basic (in shares)	24,433	23,282	24,451	23,135
Common stock equivalents-stock options (in shares)	413	572	630	485
Common stock equivalents-RSAs (in shares)	2	483	19	461
Common stock equivalents-RSUs (in shares)	26	61	42	46
Common stock equivalents- PSUs( in shares)	49	162	171	111
Common stock equivalents-employee stock purchase plan (in shares)	5	3	3	3
Weighted average number of common shares outstanding-diluted (in shares)	24,928	24,563	25,316	24,241
Net income per common share-basic (in dollars per share)	$ 1.11	$ 1.39	$ 2.13	$ 2.41
Net income per common share-diluted (in dollars per share)	$ 1.09	$ 1.32	$ 2.06	$ 2.30
Potential dilutive securities excluded from computation of dilutive securities (in shares)	600	400	400	600

Business Segment Information - Operating Results by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating results by business segment
Net revenue	$ 1,853,506	$ 1,419,406	$ 5,469,506	$ 4,144,168
Cost of care	(938,031)	(569,306)	(2,802,506)	(1,634,624)
Cost of goods sold	(571,145)	(543,682)	(1,689,229)	(1,648,670)
Direct service costs and other	(265,471)	(227,372)	(793,700)	(680,230)
Stock compensation expense	9,320	10,323	27,405	31,834
Changes in fair value of contingent consideration	148	(834)	451	(631)
Less: non-controlling interest segment profit (loss)		788		(59)
Segment profit (loss)	88,327	87,747	211,927	211,906
Managed care and other
Operating results by business segment
Net revenue	1,235,787	834,358	3,670,890	2,385,397
PBM
Operating results by business segment
Net revenue	617,719	585,048	1,798,616	1,758,771
Operating segments \| Healthcare
Operating results by business segment
Cost of care	(938,031)	(569,306)	(2,802,506)	(1,634,624)
Direct service costs and other	(179,022)	(143,550)	(543,258)	(428,432)
Stock compensation expense	2,165	2,623	7,857	8,388
Changes in fair value of contingent consideration	148	(834)	451	(631)
Less: non-controlling interest segment profit (loss)		789		(56)
Segment profit (loss)	61,699	57,595	151,472	134,854
Operating segments \| Healthcare \| Managed care and other
Operating results by business segment
Net revenue	1,176,439	769,451	3,488,928	2,190,097
Operating segments \| Pharmacy Management
Operating results by business segment
Cost of goods sold	(618,463)	(575,327)	(1,827,327)	(1,742,610)
Direct service costs and other	(74,491)	(74,976)	(221,018)	(225,782)
Stock compensation expense	1,359	5,680	4,252	17,094
Segment profit (loss)	33,639	38,686	79,043	101,528
Operating segments \| Pharmacy Management \| Managed care and other
Operating results by business segment
Net revenue	59,500	65,131	182,410	195,970
Operating segments \| Pharmacy Management \| PBM
Operating results by business segment
Net revenue	665,734	618,178	1,940,726	1,856,856
Corporate and Elimination
Operating results by business segment
Cost of goods sold	47,318	31,645	138,098	93,940
Direct service costs and other	(11,958)	(8,846)	(29,424)	(26,016)
Stock compensation expense	5,796	2,020	15,296	6,352
Less: non-controlling interest segment profit (loss)		(1)		(3)
Segment profit (loss)	(7,011)	(8,534)	(18,588)	(24,476)
Corporate and Elimination \| Managed care and other
Operating results by business segment
Net revenue	(152)	(224)	(448)	(670)
Corporate and Elimination \| PBM
Operating results by business segment
Net revenue	$ (48,015)	$ (33,130)	$ (142,110)	$ (98,085)

Business Segment Information - Reconciliation of Segment Profit to Income Before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reconciliation of segment profit to income before income taxes
Income before income taxes	$ 40,961	$ 44,975	$ 70,713	$ 84,838
Stock compensation expense	9,320	10,323	27,405	31,834
Changes in fair value of contingent consideration	148	(834)	451	(631)
Non-controlling interest segment (profit) loss		(788)		59
Depreciation and amortization	33,047	28,189	97,302	82,896
Interest expense	8,990	7,663	26,034	16,711
Interest and other income	(4,139)	(1,781)	(9,978)	(3,801)
Segment Profit	$ 88,327	$ 87,747	$ 211,927	$ 211,906

Commitments and Contingencies (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended		36 Months Ended
	May 24, 2018	Oct. 31, 2018	Dec. 31, 2015	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Oct. 26, 2015
Stock Repurchases
Percentage of total net revenues generated by AFSC				2.00%	3.00%
October 2015 Share Repurchase Program
Stock Repurchases
Amount authorized under stock repurchase plan	$ 400.0							$ 200.0
Increase in amount authorized under stock repurchase plan	$ 200.0
Share repurchases made in open market (in shares)		165,039	345,044	514,669	280,140	1,828,183	2,968,036
Average Price Paid per Share (in dollars per share)			$ 53.46	$ 81.67	$ 77.67	$ 58.40
Aggregate Cost		$ 11.2	$ 18.4	$ 42.0	$ 21.8	$ 106.8	$ 189.0
Remaining authorized repurchase amount				$ 211.0			$ 211.0

Acquisitions (Details) - SWH Acquisition - USD ($) $ in Millions	Oct. 31, 2017	Sep. 30, 2018
Acquisitions
Amount of consideration paid in cash	$ 400.0
Incentive payment for Medicare & Medicaid Services Star Rating	$ 10.0
Increase (decrease) in goodwill due to measurement period adjustment		$ 8.7

General - Cash And Cash Equivalents (Details) $ in Millions	Sep. 30, 2018 USD ($)
Cash and Cash Equivalents
Excess capital and undistributed earnings for regulated subsidiaries included in cash and cash equivalents	$ 134.2

General - Health Care Reform (Details) $ in Millions	9 Months Ended
General - Health Care Reform (Details) $ in Millions	Sep. 30, 2018 USD ($)
General
HIF fees	$ 29.9

General - Per Member Per Month Revenue (Details) - Minimum	9 Months Ended
	Sep. 30, 2018
Operating results by business segment
Term of PMPM contract	1 year
Required notice to terminate PMPM contract	30 days

General - Pharmacy Benefit Management Revenue (Details)	9 Months Ended
General - Pharmacy Benefit Management Revenue (Details)	Sep. 30, 2018
Minimum
Operating results by business segment
Expected term of PBM relationship	1 year

General - Formulary Management Revenue (Details)	9 Months Ended
General - Formulary Management Revenue (Details)	Sep. 30, 2018
Minimum
Operating results by business segment
Term of formulary management contract	1 year